HP 21 not powering on - repair/troubleshooting advice
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01-28-2021, 12:17 AM
(This post was last modified: 01-28-2021 12:52 AM by dmh.)
Post: #12
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RE: HP 21 not powering on - repair/troubleshooting advice
(01-27-2021 06:02 AM)Steve Simpkin Wrote:(01-27-2021 04:42 AM)dmh Wrote: Ok, a bit surprised as visually the terminals looked ok but some light abrasion to the terminals has given the following: I don't have any contact cleaner but tried this with just the wire strands and now the '4' key basically works - thanks :-). It doesn't register every time so can I use anything else around the house like vinegar? The '5' key also double presses so will try the same thing with that. Looks like I will have at least one working 21 so very happy about that :-) Thanks everyone! Calculator Clique on YouTube |
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