I came across this forum after searching for anything pertinent to my problems...I couldn't find anything, so I'm posting. Any help would be greatly appreciated.
So I have this laptop a friend gave me; she told me that it just stopped working one day (wouldn't turn on) so she said if I wanted it, I could have it. I have replaced many laptop motherboards and screens, so I thought yeah, I'll take it.
Here's what it does. If I plug in the AC adapter, the battery charges just fine. If I push the power button, all the LEDs behind the buttons turn on for about a second (which it would do normally). Instead of booting, though, it just turns off. The first time I do this, the CPU fan spins for a second. If I try to turn it on again, it won't spin the fan; however, if I unplug it, then plug it back in, it'll try to spin the fan once, like before. If I unplug it and run it on the battery, it'll leave the LEDs on for a fraction of a second longer, but then powers down with no spinning of hard drive or fan just like I described above.
I've torn the thing apart to where I have the motherboard and power switch connected to the battery and nothing else, looking for blown capacitors or anything else out of place on the motherboard. No capacitors looked damaged, but what I did notice was that an ant had crawled through a cooling vent and died on the motherboard. He was laying across a few resistors and transistors, so I'm wondering if his presence shorted something and now even though I've removed the ant, the damage has been done.
I'm pretty sure the motherboard is the cause of this failure, even if the ant didn't cause the problem...I couldn't imagine anything else failing that would cause the system to not try to spin the hard drive or fan and not have it be something on the motherboard. I guess I wanted to run the story by some people to see if someone knows more than me, and could confirm or dis-confirm what I suspect.
Any help, again, is greatly appreciated! Thanks!