Weird HP-71B behavior...
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08-29-2018, 07:44 PM
Post: #4
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RE: Weird HP-71B behavior...
Thanks to both of you! I think disassembly may be my next step. Joe, I did try shorting the battery contacts at first, did it again this morning, no luck either time. It's unresponsive to on-/. What's kind of goofy is after shorting the battery contacts for a minute or so and putting it back together it won't power on with the batteries, but does on an AC charger --- back to the last result ('33', I kind of wish it was '42') in calc mode and doesn't respond. Very weird. That leads me to believe I'm not fully draining the back-up cap, because I know these things don't have NVRAM or anything. (And oh, yeah, no modules in any port.)
Thanks! Will update here when I get a chance to get it on a bench if I find anything interesting. R. |
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Messages In This Thread |
Weird HP-71B behavior... - KF6GPE - 08-29-2018, 03:52 AM
RE: Weird HP-71B behavior... - Joe Horn - 08-29-2018, 04:12 AM
RE: Weird HP-71B behavior... - Dave Frederickson - 08-29-2018, 06:19 PM
RE: Weird HP-71B behavior... - KF6GPE - 08-29-2018 07:44 PM
RE: Weird HP-71B behavior... - rprosperi - 08-29-2018, 09:11 PM
RE: Weird HP-71B behavior... - J-F Garnier - 08-30-2018, 01:08 PM
RE: Weird HP-71B behavior... - KF6GPE - 08-30-2018, 02:27 AM
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