Re: HP-41C repairs in the UK? - The next problem Message #3 Posted by Steve Dimond on 29 May 2000, 5:50 p.m., in response to message #1 by John Robinson
I opened up the calculator, used the cleaner as you suggested, and, hey presto, the calculator works!
However,... the problem now is that only two of the ports work (1 and 3). If I plug an application ROM in port 2 it is ignored. If I plug a ROM in port 4, it causes the calculator to go crazy - sometimes whining, sometimes displaying strange characters, but never working. The calculator is also impossible to switch off with something in port 4. A further issue is that none of my memory modules seem to work in any of the ports, even those where application ROMs seem to work.
So, what to do? I tried cleaning the corrosion off the connections to and from the ports but this had only a temporary positive effect on port 2 (i.e. it worked for about two minutes). Any ideas?
Steve
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