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Help to repair an HP91
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07-22-2015, 05:46 PM
(This post was last modified: 07-22-2015 05:47 PM by PANAMATIK.)
Post: #4
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RE: Help to repair an HP91
(07-22-2015 02:58 PM)isanchez Wrote: Hi Paul, As for now I don't have a direct replacement for HP91/97 ACT. But there is an easy test you can do. You can insert any HP-21/25/25C ACT into your HP-91. If the display runs and shows normal numbers, then the ACT is defective. If not there is more damage somewhere. Unfortunately the normal HP-25 ACT 1820-1523 does not reanimate your HP-91 completely because it cannot do printer and card reader functions, as far as I know. If you have an 1820-1596 ACT it does work and you can find it in HP-29C and some later HP-21/25s and of course in HP-97 machines. Good luck. Bernhard That's one small step for a man - one giant leap for mankind. |
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| Messages In This Thread |
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Help to repair an HP91 - isanchez - 07-22-2015, 10:54 AM
RE: Help to repair an HP91 - Paul Berger (Canada) - 07-22-2015, 02:42 PM
RE: Help to repair an HP91 - isanchez - 07-22-2015, 02:58 PM
RE: Help to repair an HP91 - PANAMATIK - 07-22-2015 05:46 PM
RE: Help to repair an HP91 - isanchez - 07-22-2015, 06:41 PM
RE: Help to repair an HP91 - isanchez - 07-23-2015, 02:23 PM
RE: Help to repair an HP91 - isanchez - 07-24-2015, 04:40 PM
RE: Help to repair an HP91 - Paul Berger (Canada) - 07-24-2015, 05:21 PM
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