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Beep problem hp 41 repair - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: Beep problem hp 41 repair (/thread-68859.html) |
Beep problem hp 41 repair - Peter - 02-08-2005 Hi, I read through all the repair messages that this very knowledgable group has assembled but I can't find anything on this recent problem: Re: Beep problem hp 41 repair - Raymond Del Tondo - 02-09-2005 Hi, the short beep after inserting batts after a while
Just perform a BEEP, then it should disappear.
For the machine(s) which show weird stuff on the display: HTH
Raymond
Re: Beep problem hp 41 repair - Peter - 02-09-2005 Raymond, Thanks for your reply, it must have scared at least one of the HP-41's - it stopped beeping!
I checked the other one for contact between cpu and keyboard and - Voila - there was corrosion on the connector (i think it is called the zebra connector, right?) I tried to clean and fix it, yet to no avail. Got once a steady "Memory Lost" display with no keys working. Than I turned the zebra around to see if that changes anything, nope. I read in the 'Repair of a HP41 CX" article how the cpu can be hardwired to the keyboard, it just sounds like a lot of work... On a different note: One of the beeping ones seems to have been subject to a speed up and I wonder if the capacitor is broken (it looks pretty bad...). It is on the left side of the board (facing down, display on top side), where there is a second lengthy, slivery capacitor mounted on top of a first similar looking one. That second one is connected with a blue capacitor which is with a wire soldered to a spot on the top side of the board. Can I just remove the two extra capacitors and the wire? Thanks so much for your help to a repair newbie...
Peter
Re: Beep problem hp 41 repair - Peter - 02-10-2005 I just found some PPC article with respect to speed up and so I did take out the extra 2 capacitors with the cord. It then had the beeping problem that I resolved following your sage advice of "BEEP". it now works fine. Thanks a lot yet I'm sure more questions will arise once I try to revive the last of the batch, maybe I do do the hardwiring of the cpu-board... any other/better ideas, please send them forward!
Cheers
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