still does not power on after logic board replacement
Two years ago my MBP A1150 died. How? Basically the MagSafe will stay green, but the machine will not power on. The DVD drive will make some noise, but it will do nothing else.
i took it to Apple service and they diagnosed burned logic board please shell out 1000$ kthxbye. So the machine went in a drawer for the next two years.
Recently i bought a brand new logic board replacement on eBay at 250$ with the hope of bringing new life to the MBP. I followed the iFixIt guide for logic board replacement to the letter, and i'm pretty sure i made everything correctly.
However, when i connected to power adapter, it will: show up green, and it will not power on. The DVD drive will make some noise, but it will do nothing else.
If this sounds exactly what was happening before, then you would be right. So i'm tempted to believe the apple service did a bad/lazy diagnostic and is something else. The question is how to diagnose the source of the problem?
Try taking the topcase off completely, and bridging the power-on pads on the board with tweezers. If it behaves exactly the same, then at least you've ruled out topcase issues. Or I guess an even simpler way to deal with this is: Does the optical drive make noise as a response to pressing the power button, or does it make noise automatically when you connect to the AC? If it responds to the power button, your topcase is likely good.
I would also test your RAM slots by attempting to power up with one populated and the other empty, and then with the other populated and the other empty.
It's a boring suggestion, but the common denominator with both boards is that you're got the same left I/O in there, so it may be worth swapping that out to see if anything changes. It's much cheaper than the board itself, so I always try swapping that before taking a massive gamble and buying a new board.
Also, remove the battery, and disconnect the optical and hard drive cables. Until your computer has a pulse extraneous components will only complicate the issue.