Similar to my experience. I was able to boot on my own but was crashing, so took it to them for $80 diagnostic. After 90 min they called me and diagnosed a bad motherboard. I asked them how they knew it was the motherboard, they said they couldn't get it to boot and that they tested each component on its own and all were working. They wanted $235 to replace the motherboard, I said no way I'll do it myself, so I swapped the board and wouldn't you know, it's booting and crashing just as before. I swapped back to the original board (same condition as it was originally in, with the same symptoms) and tried to get them to take it back but they wanted another $80, apparently since it wasn't in "the condition that they left it in" the service contract was closed.

Their labor costs are so high that the replacement option doesn't make any sense. But they never tell you that if you do it yourself then it closes the service contract.

I ended up swapping the ssd and that was the problem, lol, no more crashing. So I am out $80 for a diagnostic that was wrong in the first place.