Android firmware without a computer. There are several steps to follow

An Android tablet user sometimes has to reflash his device himself in order to update it or get rid of viruses or problems that have settled in the system itself. The best and correct way For this purpose, it will be necessary to flash the tablet through a computer or laptop using specialized programs. Also, you should understand that self-updating the operating system using a computer is a very difficult and responsible business.

If you are not particularly versed in devices of this type, or are simply afraid to take risks, then it would be better to entrust it to those who can handle it 100%. There are a lot of specialists in this area, so it won't be difficult to find. If the tips described below do not bring the desired result, we are not responsible for all the consequences. Remember that all of the instructions below must be followed in the exact and correct sequence we specified.

What do you need for the firmware?

We will immediately describe what exactly you need in order to flash your tablet or smartphone through a computer.

• USB cable for your device and computer. With it, you will establish a connection between two devices. If the contacts in the cable come loose, the entire tablet may become faulty, so you need to use an extremely high-quality and proven cable.
• ClockWorkMod Recovery program. It is with its help that we will install the selected firmware. One of the best of its kind, the installation process is very clear and simple.
• The computer itself, through which we will carry out the installation of the selected version of Android. With its help, we will establish a connection between the archive and your device.
• Archive in ZIP format with the firmware already installed on it. Without it, nothing will work out. You can download the updates on the official website or find them on the Internet (custom version).

That, in principle, is all that is needed. The next step is to carefully prepare the device.

Preparing the device

A copy of all data is one of the most important steps during such an operation. Your data must be saved somewhere else, from where you can later install the operating system, as well as your personal data. This can be done in a very simple way. To do this, you need to go to the "Settings" Android. Then it is important to select your work Google account, click on it, turning on synchronization. In the upper right corner there is a button that opens an additional menu. By clicking on it, select "Synchronize". All data is automatically selected, thanks to which just logging into your account next time, you will see that all data has already been recovered.

The next step is to fully charge both devices. Both your tablet and laptop must be 100% charged. If you have a computer at your disposal, take care of an uninterruptible power supply. If during the installation of a new version of the operating system, any of the devices turns off, the consequences can be catastrophic. The tablet will not be able to work in the future. It can be compared to a damaged BIOS on a computer or laptop - no reinstallation of the OS will simply take place.

The most popular programs for installing firmware

There are many different programs in the world that do not particularly differ in functionality, but only make the firmware process simpler and more understandable. We will list the most popular of them, giving you a choice.

Odin

An excellent, simply wonderful program that allows its users to install the official and not only the official firmware on their device. Simple and intuitive interface, completely in English, many stable versions and many other things only make this program one of the best. However, it has its own small drawback - it was created exclusively for Samsung versions. Any, even the oldest tablet will be flashed, however, models from little-known companies, alas, will fail.

Also no less convenient and multifunctional program, which has a huge number of fans around the world. Chinese processors RockChip swept the market due to their low price and good performance. This program is designed to work exclusively with such devices. This is the main problem with this application. Overall, the RockChip Batch Tool provides a ton of useful features, but unfortunately not for all processors.

CWM is a great solution if you are looking for an installer for Android operating systems. Simple, clear and fast - no questions asked. Just a couple of commands in the command line, which can be understood with a basic level of English, about half an hour (maximum) of time, and that's it. No problem, except that it is advisable to install root rights if you plan to use this program. Some of the installation methods are very picky about them. By the way, it is this program that we will use.

Details about firmware

To begin with, let's take a look at where you can download working, full-fledged firmware for the tablet. The best and most reliable option is to download it from the official website of the device developer. For example, if you have a tablet from Samsung, then you need to look for a suitable one on the site of a Korean developer.

There is also a variant of custom firmware, which is unofficial. They can be downloaded anywhere, however, the most reliable are always located on well-known sites, the topic of which is related to android devices. For example, one of these sites is w3bsit3-dns.com, where there is an incredibly large number of any versions of operating systems, both for Android and not only. Any Chinese models, such as Ainol, 3Q and even more modern models from Samsung, ASUS and the like, can be found on the w3bsit3-dns.com website.

Updating with ClockWorkMod

• First you need to install the CWM Recovery program on your tablet. It is installed very simply, and there are several options for such an installation.
• We enter Recovery. How to enter, you can look at the website of the manufacturer of your tablet, however, for the most part, this is a combination of the lock and volume buttons. Try them.
• Already in Recovery, select the factory reset item to reset all settings before installing a new OS version. We confirm.
• In the main menu, select another item, install zip - choose zip from / sdcard -… path to the file. We confirm again. The APK file itself is installed. After reinstalling, select reboot system now.
• After the reboot, the new version of the OS will be installed. The process can take about 7 minutes, you need to wait. After installation, you can use the already updated version of Android.

Updating with Recovery

This OS upgrade option is also suitable for most gadgets. We will use TWRP-Recovery. Let's break down the whole process into several steps.

• Go to the Wipe menu - Swipe To Factory Reset - back to the main menu. By this action, we will reset the settings to the factory settings, which is very important during the system update.
• Next, go to the Install menu - the path to your ZIP file with updates, which should be on the memory card - Swipe To Confirm
• Next, there will be a process of reinstalling the OS. It does not last long, the longer process will be the first start of the system after the update. To restart the tablet with the updated version, select Reboot System.

Conclusion

As you can see, flashing a tablet through a computer is not as difficult as it seems at first glance. The step-by-step instructions provided above will help you set up your tablet without any problems. However, if it doesn’t turn on, it’s ideal to take it to a service center right away. Experts will be able to restore your firmware and data, but if you do something wrong yourself, you can lose absolutely all data, including the main version of the operating system.

Today we will talk with you about how to independently reflash a smartphone to Android via a computer. The procedure is not easy and the firmware of each gadget has its own nuances, which you will have to clarify in specialized forums. But in general terms, you will understand that with the right approach, you can restore the device at home, install third-party firmware on it, or update the stock to a new version.

Flashing an Android smartphone using a computer

First, let us warn you that this way you can “kill” your gadget. In the language of understanding people, turn it into a “brick”. In this case, you will not be able to get off without going to the service center. It is not worth tackling the NoName firmware for gadgets from China at all, if you break it, it may not be restored in the service center.

Be that as it may, we live in the age of technology, the age of the Internet - the world wide web, where, if you wish, you can learn literally everything: even the firmware of Android phones. Actually, what are you doing now. Well, let's get started ...

Search and installation of software required for firmware

It's no secret that different device manufacturers require different drivers. Fortunately, they can also be downloaded on the Internet. For example, you have a smartphone from Samsung - drivers for its subsequent firmware can be found on the official website. There is an alternative option without looking for drivers - just connect the phone to the computer, after which the operating system will select and download them on its own (applies to owners of Windows 7 and newer versions of window OS).

The next task is to download the firmware itself. The most popular Russian-language resource with official and custom firmware is w3bsit3-dns.com. Go to the forum, look for your device and firmware for it there. Choose the most interesting for you and download it to your computer.

Then you need to assign the Superuser rights to the program, that is, give Root access. How exactly to provide it, see the article we wrote earlier.

Now we return to the already familiar site w3bsit3-dns.com, more precisely, to its forum and download the CWM-recovery file for our gadget (it is important that it is for your device, otherwise you risk turning it into a “brick”).

We write to the device memory a zip archive with firmware and Recovery, downloaded earlier, or better, to an SD card.

We go back to the installed Mobileuncle MTK Tools program, launch it and it will automatically find CWM-recovery on the smartphone, you just need to confirm the update process by pressing the "OK" button.

Preparing for firmware

Without a backup - nowhere! It will be useful to us in case of an unsuccessful firmware to restore the device's performance. Go:


So, the backup has been created. To restore it, go to the installed CWM-recovery application, tap on the "Backups" item and select the newly created one there.

You should also save as a backup all data that can be erased during the firmware of the device - contacts, photos, etc.

To restore data from a backup, use the next button "Restore" - that is, "Restore". You only need to specify the path to the previously created backup and confirm its installation. As you can see, absolutely nothing complicated.

Installing the firmware on an Android smartphone

So, the new Recovery is installed, now you need to go into it. First, fully charge your device. Turn it off and, using the combination of the Power and Volume Up buttons, go to Recovery. The combination may differ depending on the device manufacturer.

Here we select "Wipe cache partition" and confirm our actions;
Now let's move on to the fun part - installing the operating system. Click on "Install from sdcard", then on "Choose zip from internal sdcard" and find the firmware file downloaded earlier;

We confirm our consent;

We are waiting for the completion of the installation process, after which we reboot the device and wait for it to boot. Do not be alarmed if the first download takes longer than usual - it should be so.

What to do if the phone does not start after flashing

If the process of launching the smartphone has not advanced further than the logo, it makes sense to reboot it again. Didn't that help either? Then reflash again. Otherwise, we need to roll back to the standard firmware and restore the Backup. You already know how to restore a backup copy, but how to roll back to a previously installed firmware version? There is only one answer - no way, you have to install it via a computer.

Let's take a look at the process using Samsung devices as an example:

If the method did not work, and sometimes this happens - you have a paved road to the service center. We warn you: the name of the programs and drivers for all programs are different, but in general the installation process is similar, so it will not be difficult to figure it out. We hope you succeed!

In the modern world, mobile devices under the control of various constantly evolving operating systems are gaining more and more popularity. Their development is associated, first of all, with the desire of developers to provide users with a comfortable use of the device. Adding new functions, improving performance - all this provides a convenient work with the gadget.

However, virtually all operating systems installed on smartphones and tablets are imperfect. This is due to the complex structure of the program system and a sufficiently large number of algorithmic steps included in the operation of the OS, as a result of which errors and so-called bugs arise that prevent a person from using the device comfortably. They can be expressed in device deceleration in some situations, refusal to open applications, unreasonable shutdowns. However, any abnormal behavior of a pocket gadget can be safely considered a mistake.

How to get rid of errors?

In order to minimize negative moments in the operation of the device, software developers regularly release updates for their products. This enables users to work comfortably on their tablet or mobile device. Updating an operating system to the latest version is called firmware. However, firmware is not always a software update. As a rule, users resort to it when their device starts to malfunction and produces a large number of errors.

As a rule, the greatest number of errors in the operation of the operating system occurs in tablet computers running "Android", which is why many owners faced with this problem have a question: "How to flash a tablet?" This will be discussed below.

What to do if the tablet "slows down"

Unfortunately, the "braking" of the tablet on the Android operating system is not uncommon. For this reason, for users of such devices, the question of how to flash an Android tablet will be very relevant. There are several ways to accomplish this operation.

The first way, as many have guessed, is to take the tablet to a service center. Of course, this option will be the most correct, but the cost of such a service will be an unpleasant surprise. As a rule, all the actions performed by the wizard can be easily repeated at home “on the knee”.

The second most popular option would be to flash the gadget on its own. There is nothing complicated and unusual in this, and if there are doubts about the official software, then it can be easily found and downloaded from the website of the manufacturer of this device.

Flashing tablets

Nowadays, a huge number of portable devices have come to the market, among which devices from Chinese manufacturers occupy a separate niche. Among such devices, gadgets with an unstable operating system are also found, and the question of how to flash a Chinese tablet, in view of the growing popularity of these devices, remains extremely relevant.

In general, the firmware of a Chinese gadget is no different from the firmware of any other, and a person who knows how to flash a tablet will not encounter difficulties on his way. Nevertheless, this operation also has its own subtleties that need to be understood.

The procedure for flashing a Chinese tablet

To correctly flash the tablet, you need a microSD memory card, also called TF. On the Internet, you should find a suitable firmware version, which can be downloaded either on the manufacturer's website or on any other thematic resources. The existing memory card must be formatted to FAT32. This is done either on a computer or directly on the tablet, if it is working properly. Then you need to move the firmware to this memory card and follow the installation instructions. The microSD card is ready. Before flashing a Chinese tablet, the gadget must be fully charged and turned off. Now the memory card can be inserted into the device and turned on. The tablet will automatically start booting from the flash card and update the firmware to the specified version on its own. After the download is complete, you need to remove the memory card and restart the device.

Things to Remember

There are several important things to keep in mind when flashing a tablet. Firstly, it is the security of the version of the operating system that will be installed on the gadget. The duration of the operation of the device, its hardware, largely depends on this item, because if the system does not work correctly, this will certainly affect the tablet processor. Secondly, before flashing the Android tablet, you must carefully read the instructions and pay attention to all the subtleties of the operation, because the success of the actions depends on this. Thirdly, use only the latest firmware versions. This will ensure the safest possible operation to change the operating system version.

In case of unsuccessful firmware

It happens so (Chinese devices are especially susceptible to this) that after updates the tablet does not turn on. How to flash it in this case is a rather difficult question, because nothing will be visible on the screen.

Nevertheless, despite the difficulty of eliminating this problem, the service technicians will definitely find a solution. By the way, do not be afraid to damage the operating and hardware part of the tablet - it can be restored using special programs.

Programs for firmware

Above, it was described how to flash a tablet through a computer. This should be done using special installation programs that will allow you to correctly write the fresh firmware to the SD memory card. Among the most popular and used programs are Odin, RKBathTool and ClockWorkMod. Correct use of these applications will allow the user to properly install the new version of the OS.

Flashing Samsung tablets

One of the most popular brands on the tablet PC market is Samsung. Among other advantages of the devices of this company, there are certain disadvantages associated with the "freezing" of the operating system after prolonged use. For this reason, the question of how to flash a Samsung tablet is often found on forums for those who like to dig into the software. Actually, there is nothing difficult in this. So, the instructions for the firmware.

1. Charge the tablet to the maximum battery value and unplug.
2. Download the official firmware version to your computer.
3. Download the program for Odin firmware and unpack it to your computer.
4. Power off the tablet.
5. It is required to enter the “Odin Mode” mode, for which you need to simultaneously hold down the “Down” key on the volume rocker, the “Home” button on the front panel and the lock button, after which a warning message will appear on the screen. Next, you need to release all the pressed keys and, as confirmation of your consent to enter the bootloader mode, press the "Up" key on the volume rocker. If a green "Android" icon appears in the middle of the screen, then the actions were performed correctly. Otherwise, you need to repeat the above instructions.
6. Run the Odin program.
7. Connect your Samsung tablet with a USB cable to your computer.
8. Next, in the program, you must press the PDA key and select the required firmware, the extension of which is either.md5 or .tar.
9. After completing all the actions, you need to press the "Start" button and wait for the end of the operation.

Now the question of how to flash a tablet does not seem so confusing, because there really is nothing complicated about it. The entire software part of the work is performed automatically.

Explay tablet firmware

Relatively recently, the Russian manufacturer of portable equipment Explay entered the market. This brand has gained popularity largely thanks to its MP3 players and tablet computers. Low cost and good reliability have firmly secured the status of "workhorses" for gadgets. In the market, tablets from this company occupy a significant niche. Nevertheless, like many devices of this kind, they have a problem with the performance of the operating system at certain points. That is why it is desirable that every buyer of this gadget knows how to flash an Explay tablet.

In fact, the algorithm can be exactly the same as in previous cases, however, due to the ease of access to the operating part of the tablet, you can make the firmware directly in the device. For this you need:

1. Download the firmware for the tablet to the memory card in any way.
2. Go to CMW Recovery, select Wipe Data and Cache operations.
3. You need to select the required firmware from the list and install it.
4. Restart your tablet.

Firmware for Prestigio tablets

The Prestigio brand, founded in Belarus, has firmly established itself in the tablet computer market in recent years. One of the distinguishing features of this company's products is that the latest models were released on the Windows Phone operating system, which in itself is unusual. Nevertheless, most of the gadgets of the lineup are equipped with the Android system. If Prestigio Multipad does not work correctly, how to flash such a device? The general scheme of actions is exactly the same as in the previous cases. Let's take a closer look.

To begin with, it should be said that the company is actively engaged in improving devices, therefore it itself releases firmware versions for its tablets. This makes it much easier to find quality software. So, the procedure for flashing:

1. Download the official firmware from the Prestigio website. Please remember that in no case should you install an older version, otherwise it may damage the device.
2. In order to start the operation, you need to fully charge the tablet, turn it off and make sure that there is no memory card in the slot.
3. Then, while holding down the "Down" key on the volume rocker, you need to press the Reset button located on the back panel once. This should be done with a needle.
4. The next step is to connect to your computer. While holding down the "Down" key on the volume rocker, you need to connect the device to the computer using a USB cable and release the key.
5. Next, you need to go to the device manager on the computer and update the driver for the tablet.
6. Now you can proceed directly to the tablet firmware. To do this, you need to disconnect the tablet from the computer and run the RKBatchTool program, select the firmware version in it. Then you need to connect the tablet to the computer in the previously described way and click the Upgrade button. The firmware update of the device will start; after it is finished, it must be disconnected from the computer and rebooted.

After we figured out how to flash a Prestigio tablet, you can regularly update it to the latest versions offered on the manufacturer's website.

Summarize

As a rule, even an inexperienced user can handle the firmware of his pocket friend, because there is nothing complicated about it. In order to know how to flash a tablet, you do not need to have the skills of a programmer.

After a couple of years of use, a smartphone user may encounter some problems with the operating system of the device. Today we will tell you how to reflash Android yourself to get rid of all these problems.

What is Firmware?

Phone flashing is the process of replacing the operating system of a smartphone in order to fix problems. This is often an extreme measure, i.e. it is applied even when other methods of solving the problem do not help. Installing new firmware is also possible when a new OS is released.

As a rule, most of the major manufacturers of Android gadgets update their products "over the air" themselves, or simply post the latest firmware version on their website. However, sometimes the phone loses support (this is especially true for Chinese devices) and then the gadget community itself releases custom firmware versions with extended functionality.

So, you can reflash your smartphone using special software:

• CWM Recovery;
• TWRP Recovery;
• ROM Manager;
• Using a computer and a special set of utilities (Fastboot, KDZ Update, etc.).

Before starting the process of installing a new OS, be sure to take care of the safety of data on the internal memory of the phone - make a backup of important information. Below we will look at several ways to install the operating system.

CWM Recovery

The ClockWorkMod Recovery utility has a wide functionality for installing new firmware for a smartphone. Unofficial firmware can be installed via Recovery, but it is not necessary to use CWM. By default, all devices out of the box already have a standard version of Recovery. Therefore, initially you will need to install CWM Recovery. This can be done through the ROM Manager.

Recall that for ROM Manager to work properly, you need root rights for your Android device. So, after installing ROM Manager on your smartphone, follow these steps:

1. Open the "Recovery Setup" item. In the next window, in the "Install or update Recovery" section, select "ClockworkMod Recovery";

1. The app will then automatically detect your device. You just have to click on the corresponding item in the menu;

1. In the new window select "Install ClockworkMod". After that, the process of loading the utility will begin;

1. Upon completion of the download, a window will appear asking you to confirm the root rights for the new application.

This completes the installation process, you should see the final message "Successfully flashed ClockworkMod recovery!"

After installing CWM Recovery, you can proceed directly to the firmware itself. Before reflashing your Android smartphone, download the file with the new OS version in .zip format. Then follow these steps:

1. Turn off the device and press the volume up key + the power button at the same time (in some smartphones, the combination for launching Recovery may differ). In the utility menu, you can navigate using the volume buttons, and the power key selects the corresponding item. Reset the settings in the item "wipe data / factory reset";

1. Click "Yes - Wipe all user data" in the new window;

1. Go back to the main menu and select "install zip". Next, go to the appropriate folder with the firmware file in "Choose zip from / sdcard".

Upon completion of the installation process, the message "Install from sdcard complete" should appear. Return to the main menu again and go to the "reboot system now" item. After that, the download of the installed firmware should begin, sometimes this process can take up to 10 minutes. Upon completion of all actions, the smartphone is ready to work.

TWRP Recovery

Installation through this utility will not have any effect on the final result, so the firmware method depends purely on your personal preferences. To work with TWRP Recovery, you first need to use the Official TWRP App, which will install the utility on your smartphone. This version of Recovery works with the same .zip files as CWM.

So, follow these steps:

1. Download the required firmware version in .zip format, place it in a folder in the phone's memory;

1. Open the utility. You can do this in the same way as with CWM Recovery (turn off your smartphone and press the appropriate key combination);

1. Reset your system to factory defaults by choosing Wipe from the main menu. To start the process, drag the slider on the screen to the right;

1. Once the factory reset is complete, return to the main menu. Go to the "Install" item;

1. Find the folder with the firmware in the device's memory, drag the slider to start the installation process;

1. After installation is complete Click on "Reboot System" to download Android.

Again, the process of downloading Android for the first time after installing the firmware can take quite a long time.

ROM Manager

In addition to its main purpose, ROM Manager can also be used to create a system backup before installing the firmware. So, to reflash, follow these steps:

1. Download the archive with the required OS version, place it in the phone memory. In the main menu of the application, select "Install ROM from SD card";

1. Find the corresponding archive and click on it. In the new window, select "Reboot and Install". We also recommend that you check the box next to "Save current ROM", so you can restore the system if something goes wrong;

1. Confirm your action, ROM Manager will automatically start the firmware installation process via Recovery.

ROM Manager can also search the Internet for custom firmwares for the device. To do this, in the main menu of the application there is an item "Download firmware".

How to flash an Android phone through a computer

To flash a smartphone using a computer at home, you need to use several desktop utilities. Below we will tell you how to install a new version of the OS via Fastboot, one of the most popular programs for this. So, first you need to download the archive with the firmware and unzip it into the "platform-tools" folder, which contains "ADB" and "fastboot".

Then you need to put your smartphone into fastboot mode. To do this, enable USB debugging, go to the command line on your computer and sequentially enter the commands cd /, cd the path to the "adb" file. In our example, the address is C: \ Program Files (x86) \ Android \ android-sdk \ platform-tools. After entering all the commands, the phone should reboot into fastboot mode.

Before reflashing an Android phone through a computer at home, format all sections of the device using the following commands:

• fastboot erase boot;
• fastboot erase userdata;
• fastboot erase system;
• fastboot erase recovery;
• fastboot erase cache.

After entering each command, you must press the Enter key. Next, enter the flash-all command, which will automatically start installing the firmware (the folder should contain the flash-all.bat file). Upon completion of the process, you will see a message about successful installation.

A common problem for users of the Android operating system is the fact that they do not know and do not know how to independently install firmware on their devices. It is for this reason that today we will talk about how to install the firmware on Android from an SD card.

Many users of the Android operating system faced a problem when the firmware had to be installed on devices using a memory card. Doing this the first time is not always easy. And, in addition, additional programs are needed to help in the correct settings. So, ClockworkMod Recovery can help you - a very powerful pirated version of the application of the same name (the official factory version can only create backups and install official updates). The essence of the utility is that it is capable of:

• restore system data;
• create backup copies of any documents and files;
• install firmware;
• load and organize the work of additional cores of the device.

You can download ClockworkMod Recovery for free and from virtually any third-party site dedicated to content for the Android operating system. Interestingly, ClockworkMod Recovery is installed in a special subsection of the internal memory of a smartphone or tablet. It can help out its owner in some very difficult situations.

Below is a complete list of the most important features of this software.

1. Installing custom unofficial firmware and additional kernels.
2. Organization of work of factory updates of any system of any device
3. The ability to install add-ons and bug fixes.
4. Debugging the connection of a smartphone or tablet to a personal computer in removable media mode using a USB cable.
5. Configuring the connection of a smartphone or tablet to a personal computer to facilitate the work with the ADB program when using a USB cable.
6. Creation of full backups of existing firmware or their individual parts (the system itself, individual settings or some applications).
7. Recovering a device using a previously created backup.
8. The ability to organize a reset of device parameters to factory settings, clear cache, dalwick cache and battery statistics.
9. Creation of certain sections in the memory of the card itself and direct work with them.

It is interesting that the technology of installing firmware from a memory card using this application looks quite simple and takes just a couple of minutes. It looks like this. Next, we'll talk about how to flash Android or give instructions on how to flash a phone using an SD card.

Wait for the installation to finish and remember that the phone or tablet will turn on by itself after the installation is complete.

In case of unsuccessful firmware

As a rule, several reasons can be identified at once for which a failure in the installation of the firmware could occur. First of all, it is the abnormal completion of the update. It occurs in situations when the smartphone was disconnected from the computer too early, the memory card with the firmware data was removed, or the device's battery was discharged. The second reason is the incorrect version of the update. Among other things, the errors of the users themselves, which they make while working, can have a great importance on the installation process.

If errors in operation, atypical for Android, occur after downloading the update via ClockworkMod Recovery, then you can fix them if you just repeat the update.

1. To do this, launch the Recovery menu again (don't forget about the volume and power buttons).
2. Further in the settings you will need to find the item "Backup and restore". It will allow you to simply restore your smartphone or tablet and return them to a previously saved state. If you have never made a system backup before, then a backup will not help you. Here it is worth using the item "Wipe data / factory reset". It will start a full reset of all settings to the factory state. In this section, use the "cache" item by simply selecting the "wipe cache partition" function.
3. Next, you need to install the operating system again using the "install zip from sdcard" item. After that, in the memory of the card, simply select the desired firmware and wait for the installation to complete.

Remember that you can repeat this step-by-step installation of the firmware through a USB flash drive with the correct settings for this card. If everything is installed correctly, then the system will not refuse to work correctly with such a flashing.

Video "How to install the firmware from the card"

You will learn a lot of interesting things from the following video.