On 17 Oct 00 at 23:12, Jerry J. Haumberger wrote:
> On 2000-10-17 [EMAIL PROTECTED] said:
>
>
> Hi --
>
> I recently opened up the PC/XT, and the 8253 timer chip is soldered on
> the board. So if it's damaged, it will have to be replaced, and I don't
> know where I could find a replacement. I re-installed all of the 18
> RAM chips, too, but after testing the system again, it only runs about
> 10 minutes before locking up, which seems worse than before. Although
> I have noticed some of the chips are warmer than others, I wouldn't
> know what is too much heat for any given chip. None of them get too
> hot for a casual touch, however.
>
> Jerry [o:--] "The" IBM AT/5170 model 319 [--^~---] 9600kbps/30M HD
> *1986 ||||||||||||||||||||||||||||||||||||| [ =====_] 512k RAM - 8MHz
>
Several years ago, I worked for HP in Scotland designing electronic
circuits.
When one board stopped working correctly after some minutes, and heat
was suspected, we threw a comercial product that came in a small
preasured can. This volatile liquid nearly froze any integrated
circuit. If it was a heat problem, we could inmediately pinpoint
which IC was the culpright.
I think this cooling can is easily found.
--------------------------------------
Alejandro Lieber <[EMAIL PROTECTED]>
Rosario Argentina
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