The BIOS key for lenovo G500

Found this procedure :

1. Download Phoenix Wincrisis on another computer, then Click on WINCRIS.exe and choose CREATE MINIDOS CRISIS DISK and press START to make: USB floppy or USB flash memory.
   When creating, select from Folder Options to view the hidden and system files and delete or rename the file config.sys if present. Read also the included instructions.

2. Rename your BIOS file (65CN99WW.cap?) to bios.wph and copy it to the USB stick.

3. Plug the USB stick into the laptop and shutdown.

4. Hold down the keys Fn+R, and while holding press the power button.

5. Now you should hear the floppy drive working or USB blinking. Hold the keys for a while.

6. Leave the computer for few minutes. If it does not restart itself, turn the power off.

7. if everything went OK the computer should start normally.

Note: Do not take off your battery before flashing. It seems that it will verify AC/DC connection and battery level and stop if one is not OK.

How do I enter the BIOS on a Lenovo Z510?

To start the BIOS setup utility:

1. Shut down the computer.

2. Press the "Novo" button and then select "BIOS Setup".

When I click on BIOS Setup a black screen will appear and it doesn't do anything

Try a System Restore.

You can choose to restore the system partition to its original status or to a previously created back-up point. To restore the system partition:

1. Press the Novo button, then click OneKey Recovery to start the Lenovo OneKey Recovery System.
2. Click System Recovery. The computer will restart to the recovery environment.
3. Follow the on-screen instructions to restore the system partition to its original status or to a previously created back-up point.

Source Lenovo Z410/Z510/Z510 Touch User Guide