A friend gave me a Compaq Presario CQ43 laptop to fix: it had a cooling fan problem, as it wasn't spinning.
I got that fixed by disassembling most of the laptop; when I was putting it back together and tried to switch it on, I've noticed that there's no display image on the screen.
Note The display image was showing normally before disassembly. I disassembled it again to check if I left any wire disconnected and everything seemed to be just fine, but the problem persists...
I would appreciate some help