presario 2800 lcd problem!!!!

[Adricher]

Hi my name is adrian, I have a compaq presario 2800, the screen doesn't work, bright spots start to appear and then all the screen is bright and you can't see anything. I bought a New Screen and replaced it, but nothing happend, the back light doesn't turn on, I've replaced the Inverter Board but no luck.
The external monitor is working ok. I have a clear picture. i've run all the test that the compaq website suggests and it couldn't detect any problems
I put the new screen in another laptop and works OK, I put the old screen in another laptop and the problem of the brightness it's the same.

I've checked all the cables and it apears to be fine, If I turn on the other computer and use the inverter board to turn on the lcd, when I connect the cable for the video card, it is all black.
Does someone have an idea what could the problem be?
Thanks
Adrian

 

[Duckworth13]

I think it must be something to do with your setup was i a full package, does it boot up could you give your sstem specs?
Cheers

 

[Adricher]

Hi, yes the computer boots up normally, if I connect an external monitor works ok, but no picture in the lcd screen. the only funny thing it's that when I go to the setup in the video card setup and try to change or select in which display I want the output I can't change the dimension of the screen and It always selects the external monitor.
windows XP was already insatalled from the vendor and it's been working allright for almost 2 years now, then one day I tried to turn it on and some spots appeared and that was the end

what worries me it's the fact that when i connect the old lcd, it turns on the backlight and is completly bright and with the new one it doesn't turn on at all.
Hope you can help
Thanks
Adrian

 

[Duckworth13]

yeh, i suppose it may have something to do with your motherboard or onboard graphics possibly is it like a dos sort of colour or a proper graphics colour, also have you checked the pins or tried another cable?