> I have a AT&T Globalyst 360 TPC with 40 MB memory,56k modem. It
> came with an
> Intel 486 DX2 66 MHz chip in a Socket 3 .
> I installed an Intel DX4ODPR100 Overdrive chip, ran the
> diagnostic test disk,
> with everything checking out OK.
> The problem is my computer boots up and runs normally for a period of time
> anywhere between 3-30 minutes then will suddenly lock up. The
> only way to get
> everything to work again is to reboot.
> I checked to make sure the chip was fully inserted and according
> to my manual
> the only jumper I had to change was JP 36 to pins 1-2.
> I know this is an old computer, but if anyone can offer any
> solution to this
> problem it would be greatly appreciated.

     Sounds VERY much like a heat problem, the DX2/66 was a 5V processor if
memory serves, there is alot of power being dissipated (by the onboard
regulator and the chip itself). After the system hangs, try feeling the chip
and see if it is hot to the touch. Even if it isn't that hot try putting a
fan on it and see if that helps. If it has a fan, try adding another. My
main system has 4 fans in it, one is the power supply, one on the front, one
on the chip itself, and another fan channeling air from the centre of the
system to the top. It's a nice wind tunnel in there! :)  Good luck, TTYL

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