wgh52 wrote:Hello Tony and all HP-Fans,
So, if anyone has had any good or bad experience with repair of an HP-41CV not powering on, I'd be extremely greateful for any answers and useful hints
This seems to mean I should not expect an answer as you or someone else did not get an answer. The guy may be incapable to answer these days now or actually may be got bored to death by the thousands of (repeatedly similar) requests over the past many years. Fair enough! It was worth a try! At least I did receive a reply that "the message was dispayed on the recipient's device". For what it's worth...cappy2112 wrote:Good luck getting a reply on this website.
wgh52 wrote:Hello "rprosperi",
sorry for the delayed reply! The forum did not flag your available answer to me despite me setting the correct options.
Thanks Garth!Garth wrote:...Your "Notify me upon replies by default:" was set to "No." I changed it to "Yes" for you... Garth (admin)
wgh52 wrote:OK folks,
Part 1 of my HP41CV repair report.
Disassembly
After removing the 4 rubber feet 4 screws were loosened, the back cover lifted. and coveres removed:
Looking into the void between the upper and lower PCB it became obvious, that there only was partial contact between them by the flexible contact rolls (no image of that, hard to take a picture, sorry), so I removed the the upper PCB and the flexible connection roll(s):
This gives access to all connection pads and also (sadly) obviated that the lower right fastening pole is badly broken (i.e. horizontally and that broken off part broke into two pieces a few moments later).
Contacts cleansing
Staying cool about that broken pole I've now first proceeded by cleaning all contactpoints with a mild nail lacqer solvent (had good experience with that in other gold on gold contact problem cases).
This is where I stand now. Next step is the repair of the mounting pole and then reassembly of the unit to see if we have progress or success already.
What I actually have at hand is an "Ethyl-2-Cyanacrylat" glue which I hope will do the job as it helped well in other plastic glueing cases which needed to provide mechanical stability... Any more hint, warning and/or advice would be much appreciated!
Kind greetings,
Winfried
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cappy2112 wrote:...What happened to the images?
wgh52 wrote:Hey "cappy2112",cappy2112 wrote:...What happened to the images?
Ooooopppsss??? The images are all PNGs and display well on my IE and Firefox browsers - even when quoted in your reply No idea why you don't seem to see them, they're posted on a picture hosting service site in Europe.
Regards,
Winfried
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wgh52 wrote:
Hope this is visible for everyone now.
Cheers,
Winfried
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Garth wrote:Your pictures have always shown up correctly for me. No problem here. I have firefox running under Ubuntu 14.04 Linux and the Gnome Flashback Compiz GUI.
The cleanser I used was explicitly stated "acetone-free".rprosperi wrote:... Acetone (your nail polish remover) can damage all plastics and even some board materials...
wgh52 wrote:One Question though:
What is the difference between the "half nut" and the "full nut" version?
How do I identify which one I need for my unit?
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