HP 21 not powering on - repair/troubleshooting advice - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- Thread: HP 21 not powering on - repair/troubleshooting advice (/thread-16231.html) Pages: 1 2 |
RE: HP 21 not powering on - repair/troubleshooting advice - rprosperi - 02-05-2021 01:55 AM (02-05-2021 01:09 AM)[kby] Wrote: Opops; that’s because I didn’t notice I got auto-spell-corrected. Apologies; Deoxit G5: Actually, Caig recommends you clean contacts first with DeOxit Red, and then treat the cleaned contacts with DeOxit Gold, as a preservative. Unsure that this wasn't a gimmick to sell 2 products instead of one, I tried to see, and was mildly surprised to see that their advice is exactly right. Red does clean better, and it's cheaper too. Just some advice... RE: HP 21 not powering on - repair/troubleshooting advice - dmh - 02-05-2021 03:30 AM (02-05-2021 01:55 AM)rprosperi Wrote:(02-05-2021 01:09 AM)[kby] Wrote: Opops; that’s because I didn’t notice I got auto-spell-corrected. Apologies; Deoxit G5: Thanks - I was wondering about that and was about to ask as other references say use Deoxit L (red I believe). Locally there's a bundle of both of them but it's $30 so I hope it works! |