VAXstation/MicroVAX 2000 CPU/FPU overheating?

[Tony Duell]

>  One thing that hasn't been mentioned. His system may be
> unintentionally over clocking. I've seen systems where the
> crystal will take of at an overtone. It is even possible that

Interesting. I had an HP9820 where the master clock seemed to be running 
at 19MHz (should e 8MHz), but that turned out to be due to the crystal 
being cracked in half (I carefully cut the can off it), and the 19MHz was 
the free-running frequcny of the TTL gates in the oscillator circuit. 
Needless to say the machine didn't work at all...

> the crystal is broken and running at some higher frequency.
>  Just a thought

I would guess that the most likely harmonic to jump to would be the 
third. Now : 

1) I dout very much any machine would be designed to run at a third of 
the clock rate that it could run at. Yes, you have some margin, you don't 
push things to the limit, but a factor of 3? So if the clock jumped to 
the third harmonic, most likely the machine wouldn't work at all

2) Even if it did, I think you'd notice it was running 3 times as fast as 
normal...

-tony