Acer 5920 Bios problem

[saksh5]

My acer 5920g laptop was working fine and had the latest bios 1.3818. When i saw that the video memory was fixed by the latest bios to 8mb fixed(non changeable).

 

I used windowsxp and flashed the bios to an older version of 1.3508. After which now my laptop led's are on but nothing can be seen on the screen(blank). I gave it to the acer people but they told me that i may have to change my motherboard. Please help me. I tried using blindflash by using a pen drive but wasnt successful. If somebody can help me or make me a crisis recovery disk iso format to download i will be very thankful.Hey i think i am unable to make the crisis disk right and that my procedure is wrong.can u give me tips to do it and Can you please make me an image of a crisis disk with the bios of my acer 5920??