How to restore bios after an unsuccessful asus firmware. How to restore BIOS on a laptop

Introduction. BOOTBLOCK BIOS.
Most of the BIOS firmware currently in use can be called "Firmware with BOOT BLOCK" (BOOTBLOCK BIOS). Such firmware is fundamentally different from earlier BIOSes in that they include an additional section called BOOT BLOCK. Thus, the firmware consists of two parts - the above-mentioned block and the main code (system area - SYSTEM BLOCK). BOOT BLOCK uses the first 24 kilobytes in the memory chip and contains information and instructions to be able to initialize a minimum of critical system devices such as the floppy drive and (some ISA card models only). The BOOT BLOCK area in the BIOS chip is read-only and can be reprogrammed by help flash utilities only using special commands. This area can only be present in those BIOSes that have a size of 256 kilobytes (2 megabits) and it allows you to recover a BIOS damaged during its update. In a 1-megabit BIOS, such an area simply has nowhere to fit, so it can only be restored using the "Hot Swap" procedure (we will discuss it below) or firmware on the chip programmer. The procedure for flashing the BIOS (the operation of the program - the flash driver) can be divided into several stages:

1. Program download and flash memory chip identification (programming size and voltage)
2. Board Chipset and Type Identification
3. Verifying the checksum of the new firmware.
4. Erase the main area in the flash BIOS chip (filling with zeros). BOOT BLOCK is not affected.
5. Overwriting the main area with the new BIOS code.
6. Load BIOS variables to default values ​​and restart the computer.

If a failure occurs during the first 3 stages, then the program may display an error message and exit, it may simply freeze or otherwise crash, but this will not damage the BIOS. If a failure occurs at the 4th or 5th stages, the information in the BIOS system area will be corrupted and the computer will not be able to start normally. You will be able to power on the computer, but the normal boot procedure will not occur. If your computer has an AWARD BIOS installed, the following message may appear on the screen:
AWARD BootBlock BIOS v x.xx
CMOS checksum error
At this point, the system will attempt to boot from the system floppy to attempt a BIOS recovery. Below we will consider the BIOS recovery methods.
BIOS recovery methods. There are several methods:

1. Using BOOT BLOCK to Flash BIOS
2. Using the hot swap method
3. Chip firmware on the programmer.
4. Buying a new chip with the required firmware.

Here we will consider the first two methods. To start - recovery AMI BOOTBLOCK BIOS.
We already know that Board BIOS that have a BOOTBLOCK section can be restored from floppy if the BOOTBLOCK itself is intact. Computers that have a corrupted AMI BIOS boot up will not display anything on the screen, but the floppy drive indicator (FDD) will light up and the system will attempt to read from the disk. The BIOS recovery procedure loaded from the BOOT BLOCK will attempt to find a file on the floppy disk called AMIBOOT.ROM, and if such a file is found, it will be written to the BIOS system area. It is important that your computer has a working system speaker connected to , because after the recovery procedure is completed BIOS system report it to four sound signals. Thus, to recover a damaged AMI BIOS, do the following:

1. Format a reliable (quality) floppy disk 1.44 mb
2. Copy the BIOS firmware suitable for your board to it. Many firmware available on the Internet are posted there in archived form. Naturally, the archive must be unpacked and copied the unpacked firmware.
3. Rename this file to AMIBOOT.ROM
4. Turn on the computer and insert the prepared floppy disk into drive A:
5. After about 3-4 minutes, the system should notify you with four beeps that the flashing procedure has been completed. Remove the diskette. The computer should restart.

The computer should now boot normally. If it doesn't boot normally, try flashing the BIOS again, possibly with a different firmware for your board. If nothing has changed, read the Troubleshooting section below.
Recovery AWARD BOOTBLOCK BIOS.
In the case of the AWARD BIOS, the procedure is similar, but there are differences. You will need to prepare a working diskette with the BIOS firmware in *.BIN format, write the flasher program and the AUTOEXEC.BAT file to the diskette. AWARD BOOT BLOCK cannot automatically restore the BIOS system area, so you will need to write BIOS flashing commands to the AUTOEXEC.BAT file. The system will run this BAT file and thus flash the BIOS system area. The recovery procedure looks like this:

1. Create a boot disk. To do this, it is best to issue the FORMAT A command from the DOS command line: /S The /S switch means that system files. If you are using WindowsME, WinNT, Win2000 or older systems, this method of creating a floppy disk is not available to you. Go to www.bootdisk.com and download the boot disk image from there.
2. Copy the desired BIOS file to the floppy disk. Many firmware available on the Internet are posted there in archived form. Naturally, the archive must be unpacked and copied the unpacked firmware. Copy the flash driver there.
3. Using a text editor (for example, Notepad) or any editor built into DOS command shells (Norton commander, Dos navigator), create the AUTOEXEC.BAT file on the floppy disk. The file must be in text format, and its name must exactly match the specified one, without the slightest variation. If you are using Notepad? then you may need to change the file extension from TXT to BAT
4. In the same text editor paste and save the following lines in a file:
   @ECHO OFF
   @AWDFLASH BIOSFILE.BIN /py
   The /py key is needed in order for the firmware procedure to start without user intervention. The names AWDFLASH and BIOSFILE.BIN are given here as an example, they should be replaced with the name of the flash driver and the file name with the firmware. It is also advisable to check if your flasher program with the /py key actually starts the automatic flashing procedure, because despite the standards, the commands may differ. To check, run your flash driver with the /? key. For example, like this: AWDFLASH /?
5. Insert the prepared floppy disk into the drive and turn on the computer. The computer should boot from the floppy disk, run the above commands, and restore the BIOS. If the procedure went well, the computer will restart and start up as usual. The floppy disk must be removed from the drive, of course. If the BIOS recovery does not work, see the Troubleshooting section below.

BIOS recovery method "hot swap"
This technique involves removing the BIOS chip from one board (from a board that is not working due to an unsuccessful flashing) and installing this chip into a healthy board while it is functioning (in standby state). This technique is very risky because you will have to remove the normal BIOS chip and insert the BIOS chip. damaged firmware while the board is energized. Moreover, you risk damaging not only both microcircuits, but also, and in especially unsuccessful cases, the entire system. There is also a risk of electric shock to the operator performing this procedure.
This procedure requires that you have two computers with the same BIOS types(AWARD or AMI) and the same types of their chips. It consists in the following:

1. Start the working computer you will be using for recovery and boot into command line DOS (DOS prompt). Make sure you don't have any resident programs loaded.
2. Carefully remove the BIOS chip from the running machine. Remember how it was installed there so that you can install it the same way later. Beforehand, you can practice removing the chip on a turned off computer so that the procedure goes quickly and confidently. Try to have all the pins of the microcircuit disconnected from the connector at the same time.
3. Insert the chip containing the corrupted BIOS into a working computer. Make sure that the key on the chip matches the key on the connector to prevent incorrect installation of the chips! If you insert the chip incorrectly, when you turn on the computer, it will definitely be damaged! Again, practice doing this ahead of time with the car turned off. Try to ensure that all the pins of the microcircuit are inserted at the same time.
4. Run the BIOS Programming Utility and flash the chip with the correct firmware required for the first (in this moment non-working) computer. If you receive a warning about a chipset type and/or board name mismatch, ignore it. If the flasher does not allow you to ignore this warning, and this is an AMI BIOS, then run the program with the /x switch to enter GUI programs and flash manually. In other cases, try running the flash driver with the /? and find out which key can help to ignore the warnings.
5. After flashing the BIOS, turn off the computer, carefully remove the programmed chip, and place each of the chips in its place. Make sure that the key on the chip matches the key on the connector to prevent incorrect installation of the chips! If you insert the chip incorrectly, when you turn on the computer, it will definitely be damaged!
6. Turn on your computer. If the procedure went well, its launch will look as usual. If the BIOS recovery does not work, see the Troubleshooting section below.

Solving problems that arise when restoring the BIOS.
Problem: After following these instructions, the system still does not boot normally and all it does is access the disk drive.
Possible Solution: This situation means that the firmware procedure was completed unsuccessfully. There are two most likely causes: an incorrectly selected firmware or a faulty BIOS chip. In the first case, you can try to repeat the BIOS recovery procedure. In the second case, you will have to purchase a new chip and flash it on the programmer.
Problem: After restarting the computer gave the message "CMOS Checksum bad" and "Press F1 to Enter Setup"
Possible Solution: This is generally not a problem. The fact is that after updating the BIOS, the values ​​\u200b\u200bof the variables set in BIOS Setup, are arbitrary. You need to go into BIOS Setup, load the default variables (commands load system defaults, load optimal settings and the like) and then, if necessary, fine-tune BIOS setup"according to your needs".
Problem: During the AWARD BIOS recovery process, the system starts reading from the floppy, then stops and nothing else happens. When the computer is restarted, the situation repeats itself.
Possible Solution: This situation most likely indicates a problem with the floppy disk or drive. Check on another computer that the disk is bootable, that it contains the AUTOEXEC.BAT file, the BIOS programming utility, and the firmware itself, and that the AUTOEXEC file has the correct contents. If you can see the boot process on the screen and the system boots into the DOS prompt, then try manually entering the BIOS flashing commands and watch for error messages. Also try using a different firmware utility and a different BIOS firmware file. If the floppy is fully functional, try replacing the floppy drive.

How to restore the system to Asus laptop

Restoring a laptop system is a process of returning to its factory settings. As practice shows, the factory settings of the laptop are the most suitable for your Asus laptop model. They are created taking into account all the parameters and power of the laptop, so returning to them is a good idea.

If you have already dealt with similar operations before, then you can handle this one, but if you are not sure, then it is better to contact the best Asus service center, to computer specialists.

System Restore will not work if:

Have you reinstalled Windows at least once? Removed during the installation process necessary files to restore the system.

Do not refer to the fact that your Windows OS was reinstalled by the master, because most likely he could also delete this file we need.

In this situation, you have no choice but to find or buy a disk with the restoration of native settings. It can also be downloaded from trusted sources using the Internet.

We will tell you how to restore the Asus laptop system if you have not reinstalled your version of Windows. In order to perform a system restore via BIOS on an Asus laptop, you need to perform preparatory work.

Preparing for system recovery

1. If the computer has important information, then you need to throw it on a USB flash drive. This is especially true for files on the C drive.

You don't have to delete anything from Disk D, but to be safe, discard important files and from this disk.

1. remember, that Windows version will also restart.
2. This procedure will take some time after the computer is first turned on for it to install all the necessary settings on the laptop.

ATTENTION!!! You will not solve all laptop problems with a system restore. Make sure you need this operation at all. By consulting with a professional before starting recovery.

This operation is not difficult. You can manage on your own.

How to run system restore on Asus laptop

Ready! Now your computer is like fresh from the store. Happy use.

BIOS firmware is a delicate procedure, so you need to approach it with special care. Sometimes, however, all precautions do not help - a force majeure occurs, during which the firmware files are damaged. Most motherboard manufacturers have tools for recovering from such failures, and today we want to talk about those for ASUS motherboards.

Working with the tool in question consists of two stages: preparatory and direct BIOS recovery. Also consider possible problems that may occur during the execution of instructions.

Step 1: Preparation

Recovery efficiency largely depends on the correct execution of actions at the preparatory stage, so it is important to carefully follow the algorithm described below.

On this preparatory stage completed, and you can proceed directly to the restoration.

Step 2Using ASUS CrashFree BIOS 3

Since technically using the utility in question involves flashing the BIOS, first make sure that the computer is connected to a power source. uninterruptible power supply. The recovery sequence is as follows:

If at this stage no problems were observed, the restoration can be considered complete.

Possible failures and their elimination

Now let's look at the problems that may arise in the process of executing instructions, and offer options for resolving them.

Flash drive not recognized
The most common cause similar error - the drive is not properly prepared or is in the wrong slot. Also, hardware problems with the flash drive itself or the USB port cannot be ruled out - check the performance of both the media and the output to which you connect it.

The flash drive is recognized, but the firmware file is not visible on it
This is usually seen by users who incorrectly named the required file. Turn off the computer, then open the flash drive on another machine and check that the correct firmware name was entered.

The computer does not respond to the connection of the drive
If all the USB connectors on the board are known to be working, this behavior indicates a much more serious damage than a "flying" firmware - most likely, the BIOS chip is damaged, and you will either need to replace the board or take it in for repair.

Conclusion

This concludes our guide to using the ASUS CrashFree BIOS 3 utility. As you can see, the procedure is technically the same as a regular firmware update.

Hello dear readers.

Any computer is a complex system. Sometimes, during the operation of the device, some problems may appear related to the correct performance of its functions in an area such as the BIOS. There are several ways to solve such an ailment - it all depends on the type of error. Later in the article I will tell you how to restore BIOS on a laptop, depending on the type of problem.

Restoring to factory settings

If suddenly the device stopped functioning normally, and you have a suspicion that the reason for this is incorrect settings, the area mentioned above, you can try to return them to the factory:

In most cases, this procedure helps. True, sometimes you can meet a simple error that does not allow the OS to start normally. It's easy to fix:

With a password

Sometimes users may encounter a situation where someone or they themselves previously set a password for the area we need, and safely forgot it. As a result of several incorrect attempts, the device will simply cease to function.

Then you have to open mobile computer. By the way, this method will help if it does not turn on:

Important! Before moving on, there are a few key points to clarify. So, in some laptops, for example, Acer Aspire, not two, but three contacts are provided. In this case, you need to set the jumper to another position and wait a few minutes.

In addition, sometimes you can find a special small button that performs the same function in its functions. You just need to press it with a pencil for a few seconds.

Another way out is to remove the battery that keeps all the important data in memory. If you remove it, everything will be reset.

Recovery after firmware

In case problems appeared as a result of unsuccessful installation new version Software for the corresponding component, you need to perform a series of movements.

If your ASUS device implemented on a modern motherboard, you can use the instruction How to flash the ASUS BIOS (ASUS EZ Flash 2) (in this case, create bootable flash drive not required)

Preparatory stage:

1. First of all, we go to the ASUS website.
2. Choose your product (laptop or motherboard), then the series and model, and then press the Enter key or the Search button.
3. The site will prompt you to choose operating system, if possible, choose the one you use, if it is on the list.
4. Go to the BIOS section and download latest version BIOS.
5. Download the utility for flashing the BIOS - AFUDOS. You can do this on the same ASUS product page in the BIOS Utilities section. Or
6. Create a bootable DOS flash drive (optional - another way to create a bootable DOS flash drive)
7. I also recommend connecting the device to be flashed to an uninterruptible power supply (for a laptop - fully charge a good battery), because. in the event of a power failure during the flashing process, the device will have to be carried in service center recovery.

1. We open our bootable USB flash drive, write the afudos program (file afudos.exe) and the BIOS itself to it (example: file p4c800b.rom).
2. We reboot and when the first picture appears on the monitor, press F8. Getting to the menu quick start and select our flash drive. Or, at startup, press F2 for laptops or Del for desktop PCs, go to the Boot tab and put the USB flash drive in first place, usually for this you need to set Removable Device in the 1st Boot Device item, then press F10 and confirm that we want to save changes in the settings.
3. The computer will boot from the flash drive and will prompt C:\> on a black screen. (or other drive letter - doesn't matter)
4. To start the firmware process, write afudos /i p4c800b.rom and press the Enter key. Launching BIOS firmware
5. Note: Do not turn off the power or reboot the system during the BIOS update! This can cause serious damage to your system.
6. Once the BIOS update is complete, the utility will return to DOS. Remove the floppy (flash drive) and reboot the system to enter the BIOS menu. BIOS firmware completed
7. Go into the BIOS and reset the settings to their original values.