SC48 crashing into Backup mode

[Greg C]

Hi guys. I have a SC48 probably 6 years old that's been relatively flawless. Lately it started crashing into backup mode, usually after a cold boot after it's been stored. Once it's recovered from 1 or 2 crashes, it stable. Before I open it up and start reseating everything, I want to get some opinions on potential common causes. Might it be:

1 - ribbon cables & connectors?
2 - failing boot drive?
3 - corrupt show file? (I usually load the same start file from 2 years ago)
3 - [your answer here]

I haven't had the board open since it was new & I installed the IO16 in it. If I go digging into it, I think I'll replace the boot drive with an SSD.

Thanks for any suggestions.