Re: HP 42S - Problem Message #4 Posted by Jeff O. on 10 Aug 2009, 12:32 p.m., in response to message #3 by Michel Lahcem
Michel,
I'm no expert, but it sounds like your unit has some sort of internal problem, i.e., it's not just a matter of clearing the memory or resetting it. If and when you decide that you have nothing to lose, Paul Brogger has written a couple of articles regarding how to disassemble Pioneers, see here and here. If you are lucky, perhaps it is a problem with the "zebra stripes." If you are unlucky, it is a keyboard problem.
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