New LCD Backlight Problem!

Please help me.

I recently purchased a replacment screen for my Sony Vaio VGN-A215M. The screen I took out (cracked) was a Hitachi TX39D80VC1GAA with the numbers 4103C 50373 in a black box with Rev A underneath. The screen I purchased had the same model number but 5051C 04401 Rev D in the box below the model number. The supplier assured me it would be compatible, and I could find no information on what the numbers below the model number meant - I guessed maybe a serial number. No where gave me information on the meaning of Rev A or Rev D either, so I took the advice and fitted the screen.

I fitted it to my laptop, and the connections are perfect and when I switch it on, it comes on for a few seconds, but then the backlight goes off. I know it works because if I hold a light to the screen I can see the screen working, but the backlight is off. This happens every time I switch it on, and nothing seems to fix it.
To check if the inverter was faulty I plugged my cracked screen back in, and it works perfectly. When I plugged the new screen in, the exact same thing continued to happened - on for a second, then backlight goes off.

I have a suspicion it might be something to do with the graphics card not recognising the new LCD - but I cannot find info anywhere that might back this up... or info on flashing the video memory. Would flashing the bios help? Sony Vaio's website has no information on flashing the bios, could anyone give me any advice on this?

I would have thaught that if it was a faulty backlight, then it would not come on at all? Would I be right in this assumption?

If someone could give me adivce on this I would much appreciate it... and please don't advise me to replace the inverter because the original LCD works fine on that inverter!

I have also tried to press Fn then external display, I have scoured BIOS for power saving options etc. but to no avail

Thanks for your advise guys I am very grateful!

 

maybe you need to replace the invertor

 

mmm for all I know, it could be that your LCD Backlight is not working.

DO you have a dual Connection to your inverter?? and if its true do you have it well connected???

BTW, You could try (if you have sufficient repair skills) to change the backlight from your cracked LCD to your new LCD, but maybe first try to ask your seller and tell him you have a problem,