How to Reset Your BIOS

Have you recently made a change to your computers hardware and need to reset your BIOS? Are you locked out of a computer that you purchased secondhand because of an unknown BIOS password? If so, youll need to reset your BIOS to factory settings. Depending on what you have access to, you can reset the BIOS from within the BIOS menu itself, reset the jumper on your motherboard, or remove and reinsert the CMOS battery that powers the BIOS memory.
Method 1 of 3: Resetting from Within BIOS
Access your BIOS. Turn on your computer and press the key on your keyboard to enter the BIOS. This is typically the Del (delete) key. Pre-built systems from major manufacturers may use a function key such as F1, F2, or F10.
If you are using Windows 8 with a UEFI motherboard, you may not have access to a traditional BIOS screen and instead will need to use the Advanced Boot menu. See Step 4 of this guide for more details.
If you cannot access your BIOS because you are locked out with a password or it has been corrupted, use one of the following methods following this section.
Find the factory reset option. The location and wording of this option varies for every different BIOS. It will typically be called "Reset to Default", "Factory Default", "Setup Defaults", or something similar. It may be located in one of the tabs or it may be an option listed near the navigation buttons.
Select the option or press the button to load your factory defaults.
If your BIOS does not have this option, use one of the following methods following this section.


Save your changes and confirm your selection if necessary. This will often be combined with the process of exiting a BIOS. Your computer will automatically reboot. If you need to change your BIOS settings once your BIOS resets, you may need to reboot your computer again and enter the BIOS to change them.
Method 2 of 3: Resetting the Jumper
Open your case. You will need to be able to access the motherboard of your computer. be very careful when working on the inside of your computer, as electrostatic discharge can easily destroy sensitive components. Make sure that you are properly grounded before working inside the computer.
Find the CMOS jumper. Locate the three-pin jumper on your motherboard that controls the BIOS. It will usually found near the CMOS battery. The jumper will be covering two of the three pins.
The jumper may be labeled CLEAR, CLR, CLEAR CMOS, PSSWRD, or a variety of other labels. Refer to your motherboards documentation to find the correct jumper.
Move the jumper to the other two pins. For example, if the jumper is covering the first and second pins, move it so that it is covering the second and third pins. Be sure to pull the jumper straight up to remove it so that you dont bend the pins.
Press your power button. Press and hold the power button on your computer for about 10-15 seconds (nothing should happen because the power is turned off). This will discharge any remaining power stored in the capacitors. This will make the BIOS reset.
Return the jumper to its default position. Put the jumper back on the pins that it was originally on. This will allow you to access your BIOS when you start your computer up. Close up the case when you are finished.
Turn the power supply back on. Move the rocker-style switch at the back of your PC to the ON (I) position. If you unplugged the computer from the wall, plug it back in.
Power on your PC. Press the front Power button. You will need to enter your BIOS and reconfigure all of the settings, including the time, date, and boot order.
Method 3 of 3: Removing the CMOS Battery.
Power down your computer. Shut down your computer from within the operating system. Locate a rocker-style switch at the back of your PC (if applicable), and switch it from the ON position (I) to the OFF position (O). If there is no switch, unplug the computer from the outlet.
Open your case. You will need to be able to access the motherboard of your computer. be very careful when working on the inside of your computer, as electrostatic discharge can easily destroy sensitive components. Make sure that you are properly grounded before working inside the computer.
For many laptops, you can access the CMOS battery from a removable panel on the bottom of the laptop. If there is no panel available, you will most likely need to disassemble the laptop to access it.
Remove the CMOS battery. The battery is typically located near your PCI slots, but may be in different locations depending on the manufacturer of your motherboard. It may be hidden by expansion cards and cables. The battery is usually a standard 3V, round, flat watch battery (CR2032).
Press your power button. Press and hold the power button on your computer for about 10-15 seconds (nothing should happen because the power is turned off). This will discharge any remaining power stored in the capacitors. By discharging the power, the CMOS memory will reset, thereby resetting your BIOS.
Reinsert the CMOS battery. Carefully reinsert the CMOS battery back into its housing. Make sure that you have put the battery in the right direction. The slightly smaller side should be facing down.
Close your case back up after reinserting the battery.
Turn the power supply back on. Move the rocker-style switch at the back of your PC to the ON (I) position. If you unplugged the computer from the wall, plug it back in.
Power on your PC. Press the front Power button. You will need to enter your BIOS and reconfigure all of the settings, including the time, date, and boot order.

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How to Mod your Laptop VGA BIOS

Basically there are 2 locations where the VGA BIOS in laptops.
Some OEMS embed the VGA BIOS in the EFI/BIOS in your laptops,
other OEMs have a separate VGA BIOS firmware on the VGA Card itself.

TYPE 1
As a general rule laptops with discrete MXM board modules like the (picture below) has
the VGA BIOS as a separate piece of code located on the module itself.
It is NOT part of the EFI/BIOS of the Mainboard.

TYPE II
For OEM Boards with a GPU embedded on the Mainboard itself the VGA BIOS usually exist as a chunk of Code inside the BIOS of the Mainboard itself.
(Picture below shows the GPU on the top left corner on the mainboard covered by the black plastic)


Nowadays more and more OEMs are using TYPE II method of integration because
1) They can make the laptop more compact and light because separate MXM modules increase the thickness of the laptop.
2) It is cheaper to integrate everything on the mainboard using BGA soldering rather than have PCI-E connectors.

This article talks about modifying Type II VGA BIOS only.

First you have to identify the Type of Firmware the laptop uses, this is depends on the BIOS Vendor used by the OEM. An OEM can use a different BIOS vendor for different models.

The most prominent BIOS vendors are: Insyde, AMI, Phoenix, AWARD and Intel.

On the website mydigitallife you can find many tools coded by the members for BIOS disassembly.

We are going to use their tools to dissemble the VGA Module from the BIOS.

In this example, the Aspire 4740G uses the Insyde BIOS so download the PhoenixTool which is capable of dissembling Phoenix, Insyde, Dell and other EFI BIOS.

After downloading the PhoenixTool we decompress the PhoenixTool contents to a new folder.


We extract the PhoenixTool to a folder called  "NEW". The main program is called PhoenixTool.exe
After decompressing the disssembly Tool we proceed to download the EFI/BIOS from the OEM website and decompress it as well..


From Above we can see the Complete BIOS Firmware is called NALG0x64.fd.
BIOS usually uses file extension such as BIN, ROM, BIO, WPH, FD and many more. Different BIOS Vendor usually use a different identifier.


When we use the PhoenixTool.exe to open the NALG0x64.fd file, the tool also display the emergency Insyde Recovery Filename.


After the modules have been dissembled you should see the screen above. The modules have been dissembled in a newly created folder called "DUMP" where the original NALG0x64.fd is located.


The Red Box shows the VGA BIOS module. The VGA BIOS module is usually a 70-60KB file, to confirm if it is the VGA Module, you open it with a dissembler and check the content, you should see Nvidia text reference in the binary.


The dissembly of the file shows a lot of Nvidia Text Reference to further confirm if it is the exact module you want you should Google the SKU Code in the example above it is "GT218" which references to G310M Nvidia GPU.
Some laptop BIOS has more than 1 VGA BIOS because 1 Model can have many variations of Different Nvidia SKU GPUs.A good example would be the Acer Aspire 4741G.

Next Download the Nibitor from MVKTECH website. Open the VGA Module and choose "Tools" Fermi Voltage Editor (For Newer Generation of Nvidia GPUs).
For ATi you would probably use Radeon BIOS Editor (RBE).
As you can see the original BIOS has the P3 state which is the default state (the lowest performance state) set at a voltage is 0.85V that is why when using HWMonitor you will never see the voltage drop below 0.85.
The lowest performance state can however use a lower voltage of 0.80V.


So we set the P3 State to 0.8V and Apply. Save the Modified VGA BIOS and exit.


Using EzH20, a Insyde BIOS Editor we open the original NALG0x64.fd file.


Select Components -> Replace Module. Each Insyde Module has a Unique GUID identifier.
8 Character - 4 Character - 4 Character - 4 Character - 12 Character
The Module we seek has the identifier "AC1E1B97-69C4-475D-8471-0F3893802F96"



Under "Module to Load" browse to the modified VGA BIOS.


Under "Change ROM GUID" enter the original identifier: "AC1E1B97-69C4-475D-8471-0F3893802F96"
Then Patch the Firmware.


Finally Save the Modified Firmware and flash it with the Insyde flashit Tool while replacing the original NALG0x64.fd with the modified NALG0x64.fd.

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