My original Macintosh 128K/plus system didn’t work after I pulled it out of storage, though it was working perfectly, when removed from service some years before. Same thing with my Apple II. Another classic, my Compaq portable wasn’t behaving too well, last time I tried it. It took a few whacks on the side, before it would start up. My newer, but retired, Macs all seem to have floppy drive problems these days. I had to to disassemble and really clean out and lube the imagewriter before it would work properly. I’m still waiting for replacement sound insulation foam to arrive before I refoam it and put the cover back on. My conclusion, is that the best way to keep stuff running, is to use it.

FYI, I have a buch of orgininal 128k main logic boards and anolog boards in storage. When I put them in storage they all worked perfectly.