From here: do not remove anything from the interior of your
by LucJPatenaude - 4/15/12 1:34 PM
In Reply to: What causes a blank screen when I turn on my computer? by onelane
It is your Bios of that computer's motherboard that is at fault here.
By using the Support page of Asus.com: http://support.asus.com/download/Options.aspx?SLanguage=en&type=5, enter the exact name of the Model of mainboard that is in this computer or, its Serial Number that is located on that very motherboard.
Download Asus' Bios utility to determine the newest Bios available for such Motherboard. You will see that in your new Asus folder in rather the x64 one or the x86 one of the main Programs folder that there will be a document file for you to read. This is to explain why you needed that upgrade file so badly. A whole list of fixes has been applied and, sounds like the maker of such Bios file needed to patch it up even further.
Good Luck at booting this machine up in order to apply this Bios fix.