Jihilian, were you able to test this eBay chip ? I bought a new mobo and it did not work either, it reacts just like when I bricked my original mobo. I hope it's not the video card or anything else. My question is, if the GPU has gone bad, should the notebook do some sort of warning sound like saying no GPU detected ? I read that bios tend to have different sound beeps for different problems.
THE BIOS CHIP FROM THE SECOND SOURCE ARRIVED AND IT WORKED !
I also managed to dump the file from the chip so:
FLASH THIS FILE THAT WILL REVIVE YOUR G75VW. FLASH IT WITH A PROGRAMMER (YOU WILL NEED TO UNSOLDER THE CHIP, PROGRAMM IT AND THEN RESOLDER IT).
Hope it helps millions of G75VW owners as it worked for me.