How to Repair Corrupted BIOS Firmware

Several troubleshooting steps can be taken to attempt to repair the corrupted BIOS firmware if your computer’s BIOS firmware has been compromised. Assuming your motherboard is equipped with a backup BIOS, you can use it to repair the corrupted BIOS by booting into the backup BIOS. The replacement of the BIOS chip may be an option if your motherboard does not include backup BIOS software. However, in some cases, the only option available may be to completely replace the motherboard and all of its components. This ementes teaches you how to repair a BIOS that has become corrupted.

Steps

1. Check to see if your computer is still covered by the manufacturer’s warranty. Check to see if your computer is still covered by the manufacturer’s warranty before making any repairs yourself. Your warranty may be voided in many cases simply by turning on your computer for the first time. For computers still under warranty, it’s best to contact the point of purchase or manufacturer and have them repair your computer.

If you built your own computer, you’ll want to check to see if your motherboard is still covered by the manufacturer’s warranty.

2. Booting from a backup BIOS is recommended (Gigabyte motherboards only). Some Gigabyte motherboards are shipped with a backup BIOS already installed on the motherboard; this is known as a backup BIOS. It is possible to boot from the backup BIOS if the main BIOS has been corrupted. The backup BIOS will automatically reprogram the main BIOS if there is anything wrong with it. If it does not automatically boot into the backup BIOS, you can force it to boot from the backup BIOS by performing one of the following steps:

Method 1: Shut down your computer completely. Hold down the power button until your computer restarts. Continue to press and hold the power button until the computer shuts down completely. When you turn it back on, it should automatically boot into the backup BIOS.

Method 2: Shut down your computer completely. Press and hold the Power button as well as the Reset button for approximately 10 seconds before releasing the buttons. When you turn on your computer for the third time, it should start up with the backup BIOS installed.

Method 3: This should only be used as a last resort. It may be necessary to open your computer and access the motherboard directly if you are unable to get your Gigabyte motherboard to boot into the backup BIOS using either of the two methods outlined above for doing so. Look for a chip with the letters “m-BIOS” or “Main BIOS” or something similar in the labelling. Make a short circuit between Pins 1 and 6 on the chip with a wire or a paperclip. An icon in the shape of a triangle or a red dot should be displayed next to pin 1 (which is usually the one on the bottom right). Pins 1, 2, 3, and 4 are all located on the same side of the board. Pin 5 is directly across the board from Pin 4, and Pin 6 is directly across the board from Pin 5. To keep the pins 1 and 6 stable, use a paperclip or a short piece of wire to connect them (be sure to touch something metal before touching the inside of a motherboard.) It is best if you have another person turn on the computer. When you hear the beep, take the paperclip or wire out of your pocket. If you do this, your computer should be forced to boot into the backup BIOS.

3. Remove the dedicated graphics card from the system. A small number of users have reported that removing the dedicated graphics card and connecting your PC to the integrated graphics card has resolved their BIOS issues.

Warning: Before performing any internal computer repairs, make sure that your computer is completely turned off. Always keep your hand on something metal outside of your computer or wear static wristbands to keep your body grounded to avoid becoming dehydrated. Static discharge, which can cause permanent damage to your computer, is avoided as a result of this.

4. Reset the BIOS settings. Depending on the circumstances, you may be able to resolve issues caused by a corrupted BIOS by resetting the BIOS. This can be accomplished in one of three ways:

Boot into the BIOS and restore the system to its factory defaults. If you are able to boot into the BIOS, you should do so without hesitation. Look for the option to “Load Setup Defaults,” “Restore Factory Settings,” or something along those lines on the menu. Resetting the BIOS can be accomplished by selecting this option.

Take the CMOS battery out of the motherboard and set it aside. To gain access to the motherboard, unplug your computer and open the case of your computer. In this case, it is the large board to which all of the cables, chips, and computer cards are connected. Identify and locate the CMOS battery. In most cases, it is a type CR2032 battery that is approximately the size of a quarter in size. Carefully remove the battery and allow it to rest for 20 minutes before replacing it. If your computer is a laptop, you should also remove the battery from the laptop. Try replacing the battery with a new one if this doesn’t resolve the issue for you.

Reset the jumper by pressing the reset button. On older motherboards, this is typically done as a precaution. To gain access to the motherboard, unplug your computer and open the case of your computer. Next to it, look for a jumper cable with the letters “CMOS” or something similar on the end. In this case, the jumper will be placed on two of the three available pins. Remove the jumper and replace it one set of pins over on the other side of the board. For approximately 15 seconds, press and hold the Power button on the computer’s keyboard. Return the jumper to its original position by pressing it in.

5. Update the BIOS on your computer. In some cases, you may be able to resolve issues caused by a corrupt BIOS by simply updating the BIOS on your computer. When you are updating your BIOS, make sure that your computer has a consistent power source connected to it. The interruption of the update process may cause permanent damage to your computer’s operating system. You’ll need to know what version of BIOS you’re running in order to proceed. To update your BIOS, follow the steps outlined below:

Find out what version of the BIOS you are currently running on your computer. If you are able to boot into your BIOS, it will inform you of the version of BIOS that is being used on your computer. Assuming you can boot into Windows, open the System Information app by selecting Start > All Programs > Run > System Information and clicking “System Information.” Check the “BIOS Version/Date” field to see which version of the BIOS you are currently using. If you are unable to boot into the BIOS or Windows, it is highly unlikely that you will be able to update your BIOS.

Consult the website of your computer manufacturer for more information. If necessary, you can complete this task from a different computer.

Download the latest BIOS file and save it to a flash drive for safekeeping.

In order to update your BIOS, follow the manufacturer’s instructions. From one computer manufacturer to the next, the procedure will be slightly different. It is almost always necessary to copy the BIOS update file to a flash drive or to create a bootable flash drive in order to perform the update. If you use a bootable flash drive, you will either boot directly from it or boot into the BIOS and select the option to update the BIOS from a flash drive.

With an HP computer, you may be able to upgrade its BIOS by turning it off and then pressing the Windows key plus B plus Power at the same time, for approximately 3 seconds. Release the Power button, but keep the Windows key and the B button pressed until the BIOS update screen appears, then release them. It’s possible that your computer screen will go blank and that you’ll hear more beeping sounds emanating from it.

6. Replace the BIOS chip with a new one. This is only an option if your motherboard has a BIOS chip that is slotted, such as a DIP or PLCC. If the BIOS chip is soldered to the motherboard, the only option available to you will be to replace the entire motherboard with another one. If you are able to replace the BIOS chip, you should follow the steps outlined below to do so:

Remember to make a note of the manufacturer and model number of your motherboard.

Purchase a replacement BIOS chip that is compatible with the motherboard model that you currently own. BIOS chips can be purchased online from a variety of sources, including eBay and specialty websites such as Newegg and BIOS-Chip24. Some places may require you to send in your old BIOS chip to be reprogrammed before they will accept your new one.

Make a note of the location of the BIOS chip on the motherboard, as well as which end the notch is pointing.

Remove the old BIOS chip by carefully prying it loose with a small pick or a jewellers flathead screwdriver. If you don’t have an extraction tool, you can use a jewellers flathead screwdriver.

When installing the new BIOS chip, make sure the notch on the new BIOS chip faces the same direction as the notch on the old BIOS chip. By pressing the prongs against a solid flat surface, you can carefully bend the prongs inward if they are too long or too wide.

7. Replace the motherboard with a new one. As a last resort, if you are unable to replace the BIOS chip, and you have attempted to reprogram it or resolve the problem by resetting it, your only option is to replace the motherboard. A new motherboard can be purchased from a variety of sources, including Amazon, eBay, and computer specialty stores such as Newegg.com.

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