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HP 28C Calculator not power on
11-27-2019, 05:25 PM
Post: #4
RE: HP 28C Calculator not power on
(11-27-2019 04:06 PM)mfleming Wrote:  I picked up a 28c once, very cheap, whose seller said the display only blinked briefly when turned on. I opened the battery door and out tumbled three 12V batteries! Calculator still worked with proper cells afterwards.

Surprising (that it still worked)! Definite progress from the power supply situation in the Woodstocks and Spice (though of course that damage was from the the AC in the transformer, not just batteries, but still!).

--Bob Prosperi
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HP 28C Calculator not power on - Francis - 11-26-2019, 07:47 PM
RE: HP 28C Calculator not power on - rprosperi - 11-27-2019 05:25 PM



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