Re: Advice on HP-25 repair, please. Message #3 Posted by Michael Meyer on 9 Dec 2009, 7:44 p.m., in response to message #2 by Vieira, Luiz C. (Brazil)
Well, I replaced the ROM(0) chip under the display. Then, the calculator would go blank with the execution of any function!
Running out of de-soldering wick and hope, I replaced the vertical ROM chip from a dead board.
To my pleasant surprise... it works!!!! Programs, runs, etc.!!!
SUCCESS!!!
Thanks, as always, for the hints!!!
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