Ensoniq EPS "disk not formatted" error (again)

[merovie]

I've asked this question before but I thought I had it figured out:

So I took my Ensoniq EPS rack mount to a place in Austin called Switched On. They specialize in synthesizer and musical hardware repair. I told them what I thought the problem was. A long time ago when tinkering with the ribbon I had accidentally had the holes and the prongs on the motherboard not lined up perfectly and so when I pushed the ribbon down some of the prongs got bent. I straitened them out with little needle nose pliers but the on-again off again "disk not formatted" error, of course, kept up its devout mission to make me pull my hair out and scream.

They had it fixed in less than an hour. Yes, the pins on the motherboard whatchamacallit were a little bent and that (32-pin I believe) whatchamacallit needed to be reseated. But my beautiful machine came back from the dead!

Until yesterday. Yesterday it started giving me the same nonsense. Of course, I live in Texas and it has never been this hot before and like I said in my previous post, I don't keep the window unit going in that room 24/7 to save money because I'm poor. (Usually the powerful window unit in my adjacent bedroom keeps that room from becoming intolerably hot anyhow) I honestly thought that the whatchamacallit on the motherboard should have been entirely replaced, but my EPS has worked fine, and has been in the exact same place without being moved since November. Also, my computer with Reaper, Cubase, and a bunch of VSTs still works fine, although it is on the floor and the Ensoniq is actually on a bookshelf about 5 feet high. (Not now. Now it is in a room with AC going 24/7 on the floor)

I had a spare ribbon from Syntaur in New Braunfels (they specialize in synth parts) so I swapped them out. Carefully. Same problem.

It may be pertinent to also tell whoever is reading this that I have a GoTek USB floppy emulator, but the problem has nothing to do with that because if it did my machine would say "please insert disk" before crapping out. (Which reminds me: how do I copy my USB to another USB? Do I have to use Daemon tools again, or is there a way to format a USB and just copy everything?)

So (a) how hot does a room need to get before the actual motherboard components start to be affected? It's gotten up to 110 in Texas (where I live) but I doubt it got that hot in that room. And (b) any guesses as to why it decided for no reason to act up again?

Thanks in advance