Hi, I have question about your post CQ62-220 intel version, your good bios image 1484.bin, as you posted, is the same as bios F37 from website (you tried at beginning).
I compared your bin with fd file from website F37 image by command fc /b, there are no differences. This image makes my CQ62-220ec running with blank screen. Can you help me please? Have you tried reflow of GPU before ? Thanks, Petr