|HP-41CV bad I/O ports|
Message #1 Posted by W. Bruce Maguire II on 2 Mar 2003, 4:47 p.m.
I bought a bare-calc. 41CV (full-nut) off eBay a while ago, and it has worked fine ... until I went to plug in my new Time module! >:-P The Time module locked the machine up, and a memory-clear reset with the module in did not help. I think the Time module is good. Unfortunately, I can't test the Time module, because my only other 41 is a CX.
I then tried a known-good "Stat1" module, and it was at least recognized by the 41CV (Catalog 2), but only in ports 2 or 4. In ports 1 and 3, the 41CV did not "see" the module at all.
Lastly, I tried plugging in my 82143 printer---which works fine from my CX---and the printer would *only* print lines of diamonds, regardless of the port!
So, I appear to have a 41CV with very flakey I/O. Looking in the four ports, the connectors look perfect: all nice and shiny. Also, I tried repeated insertions/removals with no change in behavior for any of the tests. This makes me very much doubt that it is a connector issue.
Unfortunately, I have no repair experiance with any HP, much less a 41-CV (full-nut). I am an electrical engineer ... but ... let's just say that it has been a while since I've played with hardware! ;-) Can any of you hardware gurus (Tony?) tell me if there is any chance that this is repairable without SMD-soldering skills? I do have a cheapo soldering iron, power supply, DVM, and a small scope (GREAT, inexpensive, single-channel, 5 MHz, Velleman HPS5 handheld; note the ironic model number!).
Thanks in advance!