Re: HP 25C repair advice Message #8 Posted by David Smith on 30 Dec 2002, 3:45 p.m., in response to message #7 by Andrés C. Rodríguez (Argentina)
I think mayby the new ACT is also bad (probably was on the edge to begin with and heat/static did it in) or the machine has a power supply fault that is killing them.
The problem that Katie described does not match the 000000000 display, but her fix is very easy to try so it is definitely worth a go. My experience has shown that the 0000000000 display has always been ACT related... I have over 20 dead ACT chips that showed the same problem.
Although the various woodstock machines have different part numbers on their ACT chips, only the HP27 chip seems to be internally different. I have transplanted ACT chips among all the other machines without problems.
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