re: Computer issue, possible power supply issue? could be HDD I don't know

It's an OS issue. I had a similar issue with a laptop years ago. I'm pretty sure that disabling sleep was the fix. There may have been an update later that fixed it, though, so you may want to check it out. I doubt it's hardware, though. If it's a consistent effect of sleep mode and a hard reboot fixes it, it's most likely just a problem with sleep mode.