I need an Ubuntu expert please!!

I am having a reboot freeze issue. For whatever reason my rig will do this only on ETH so far. Other coins have not done this so I think it is an OC or heat issue. However thats not the main concern.

Once the system reboots it gives the usual black screen, BIOS , then flashes to a blueish screen. Sits there for a second or 2 then flashes again to the same blueish screen and stays forever.

When the system reboots properly that second flash is followed by the loading of nvOC and mining commences. So it is right before the command to load.

This happens randomly and not every time it reboots.

I know this thing has to keep logs that we can look at to see what step it is failing to load on. Right?? It has cost me HOURS of downtime when it fails at 3am. This time it mined ETH all evening and night and failed at 0530ish.. I found it at 0700.

Last week I mined a different coin and it did not have one single failure!!

So who can help me troubleshoot this mystery?

Thank you in advance and remember, I know very little about Linux ( I took a couple classes 15 years ago!) so if you do make a suggestion pretend you are writing it in Greek cause thats what it is. I will need it barneystyle!