3625 Vapo.protect errors

A model 3625 Vapo. protect Mastercycler began giving errors and was not able to start cycles. Upon powering on, it gave ErrorCode: 0x010A "Error reading version of power supply unit. Please check the cycler software version and cycler number". I could get to the login screen, and was able to select and start a cycle. But the cycle would immediately fail and give ErrorCode: 0x0DA2 "Wrong state of lid (no plate/tubes?)". It had been plugged into a small UPS. I switched to a standalone outlet, and the 0x010A error went away. But I would still get the 0x0DA2 error when attempting a cycle. Noticed the lid display was blank. Unplugged the unit, took the back panel off and found it was extremely dusty all over the circuit boards. Blew out the dust, checked as many electrical connections as possible. Everything looked decent. Powered it back up and everything worked fine, and after putting some tubes inside to clear the 0x0DA2 error it ran most of a 30 minute cycle. But near the end it stopped, and the lid display went blank again. Then I would get "Cycler not found" each time I tried to start a cycle. What else can we check for to get this back up and running? I appreciate any help.