What would you do to troubleshoot this?
Booting my system requires unlocking the drive (OPAL SED w/PBA), then restarting. If the computer (more specifically the drive) loses power during the restart, the drive is locked again, meaning I have to enter the password again. I get stuck on this loop at least four times these days. Eventually, it always works, but I fear it's getting worse.
All of the hardware is 6-7 years old, but high end. I've never once noticed the platinum power supply turning on its fan, and I've never smelled anything like a burnt capacitor out of it. With how reliably everything else works, I can't imagine there being a serious motherboard fault either.
Perhaps a year ago, I did a thorough cleaning, wiping down non-electronic surfaces and using compressed air in some places. I hadn't used the system much since - I'm a remote worker preferring to use my laptop. The COVID-19 situation has left me at home constantly, so I found myself wanting to use the more powerful desktop, meaning I really started to notice the problem.
One theory so far: something is worn out, or damaged by icy compressed air, and some electronic junction needs to get hot in order to carry current reliably. The multiple restarts may be leaving time for it to warm up. This sounds far fetched, but it's all I've got.