I'm definitely bummed to see all the threads about dead or dying or malfunctioning OP-1's here and elsewhere.
Got mine brand new today, paid over retail to get it for some soundtrack work (not crucial, Reason 9.5 is my go to). Thought I'd get ahead of things and update to the latest greatest OS, so downloaded from TE site, followed the instructions to the T and restarted. Black screen, nothing. So. Decided to give it a full charge and see if that fixed things. It didn't. Since I can still get into the TE Boot menu, did the functions tests (all passed), did the factory reset - no change, tried switching to a charger instead of connecting to the pc - no good. Re-downloaded OS 2.18 and did the firmware update process again - said it completed fine. Rebooted - nothing still. Reformatted the drive, reinstalled the OS - OP-1 says all went as planned, still won't start up.
Doing the battery recalibration trick as mentioned just about everywhere. However I haven't seen a thread yet where that actually fixed the not starting issue, so not terribly hopeful. This is a huge drag. I emailed TE support, but expect that they will likely advise I do all of the above again as well as the battery trick. Should I just return this thing? I've seen in one other post that someone has OS version 2.20 installed on theirs. Did I nuke a new machine by going backwards by mistake???