Faulty top cover preventing boot?
Hello all, I recently purchased a untested A1286 15” MBP.
it came with no battery or HDD, I installed a known good battery and a SSD with El Capitan.
it would boot to grey with Apple logo and loading bar, at about 3/4 progress, it would fade to black, come back with a blank grey screen, and hang.
Now I dug a little further, because I noticed it was powering on by itself once I plugged the MagSafe in, and I couldn’t get a response from the keyboard. I found that the trackpad connector was MIA and the keyboard connector was unplugged. (It does have a couple of missing keys, I assume damaged.)
but, when I plug the keyboard connector in and reboot, it chimes, lights up grey very briefly, then goes black. Certain commands on the keyboard make the caps lock LED briefly illuminate, or if I hold it, it strobes or flickers. It makes more progress with keyboard unplugged, and that’s very confusing. Am I looking at a top case/keyboard/trackpad issue, or have I lost the logic board?
I get proper led color from the MagSafe connector, and I’ve removed and inspected the logic board very carefully under magnification. I see no sign of water damage or burnt components.
Ist dies eine gute Frage?