HP35 problem with a calculator, maybe due to a faulty charger
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03-21-2021, 08:18 PM
(This post was last modified: 03-21-2021 08:19 PM by aurelio.)
Post: #20
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RE: HP35 problem with a calculator, maybe due to a faulty charger
(03-21-2021 06:52 PM)teenix Wrote:Thank-you Tony to help me in understanding., I've searched, while, for HP schematics and hardware on the web, reading expecially the Jaques's Laporte site... so it could be as you think a faulty ROM or relared circuit (I read about the reset on power-up). Well to know that it's possible to get replacement CPU boards for the classic, I'have just spare boards for the 41s (after convertion in CL(03-21-2021 04:43 PM)aurelio Wrote: Well, if the voltage on test point is the one expected it means maybe that the PSU works properly, so what would be the next step in the troubleshooting? I've searched on the auction site and found only a few calculators for sale (in to be repaired conditions) .. not cheap and all from overseas with also import fee costs |
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