Re: deja vu
"So Del whacks it and up it comes..."
You may laugh, but the old ceramic 286s used to get so hot(*) that they'd cause thermal problems with their sockets. They'd power up and work for a couple of minutes, then lockup. A whack would reseat the CPU socket fingers and off it would go until switched off and let cool.
The advice given was (obvoiusly) "Don't turn it off"
(*) Hot enough that touching one resulted in a sizzling sound and a blackend fingerprint left behind. I sported a huge fingertip blister for 10 days.(**) Very few of them were ever fitted with heatsinks despite the obvious benefits.
(**) The only other time this occured is when I inadvisedly made contact with a 1980s vintage photocopier fuser in the days when they weren't adequately protected against such things. Even old valve amps didn't get that hot.