On Wed, 02 Feb 2005 04:48:01 GMT "James Sweet"
wrote in Message id: 5YYLd.2200$uc.1120@trnddc09:



At 4.8 volts you may want to see what's going on there with the power
supply, have you looked at the +5 with a scope?



Pac boards use an onboard linear regulator, it's a fairly common trouble
spot, first thing to do is resolder everything suspect in that area, get
very close to 5v and go from there. It's surprising how intolerant some TTL
chips are to low or high supply voltage.

I hadn't realized that with regards to the linear regulator. Could very
well be some failing electrolytic caps, causing a lot of ripple in the +5
rail. That would certainly explain a low reading if he were using a DMM
instead of a scope.