Disable CD-ROM in BIOS

Please try to close the lid right after you press the start button. This works on my HP 6730b here, i can see the BIOS then.

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.