I just tried updating to 3.61. It goes through entire installation (reaches 100%), then goes black (except for about 50-100 seemingly random pixels). I've tried leaving it there, it never changes. I've tried turning it off by holding the I/O button. It will turn off, but I cant ever get it to restart.
I can't get it to boot into safe mode either. After some period of rest (in standby) I can get it to turn on and attempt install again, but it keeps getting stuck on the black screen.
Any ideas? I don't have another HDD to try.