Hi, a friend brought his laptop to me because it would not power up or do anything. I took a look at it and after a few tests I concluded that the motherboard was bad. I located the part number on the motherboard and found a replacement that had the same part number and same revision so I ordered it.
I took the original board out and found lots of dust in the fan vent, so that is probably what caused the original problem (from overheating since the vents was more then 85% restricted) and I installed the new board and I noticed a few small differences in the two boards. The first differences I noted was on the replacement board there is no hardware connector installed to connect the right side speaker. I see the designated area on the pcb, but there is just no connector soldered on. The other thing I noted was there was also no hardware connector to plug the right side usb card into. But those are minor issues, if one speaker did not work and one side of the usb ports did not work It is not that big of a problem. So I left the usb card and the right speaker unplugged. I hooked up other components and did a power up test before I put all the screws back in, and I the laptop power key now illuminated when I pressed it (it did not with the original circuit board) and I could also hear the fan spinning and hard drive spinning (none of them worked on the original board).
The only problem is the lcd does not illuminate.
I also see on the replacement board there is a connector soldered to the motherboard that is for the touch screen. The original board does not have touch function, so the manufacturer did not install the hardware connector on the original board.
So is there any other tricks to get the screen to work? (maybe re flash bios or something?) Or would I have to buy another board that does not have the touch screen plug hardware installed?
In the attached photo I circled the slight differences in hardware.