|Re: Failing ports on HP-41|
Message #3 Posted by Raymond Del Tondo on 9 Nov 2007, 7:21 p.m.,
in response to message #1 by Geir Isene
as Gerry noted, the connectors can suffer from wearing out.
Another option is dirt or dust on the contact areas.
You could carefully try to clean the surfaces with a Q-Tip.
If that doesn't help, there's a chance that the main connector,
which connects to the keyboard backplane, has some corrosion.
Depending on the state of the corrosion, you can clean it yourself,
or have the connctor replaced.
Another cause of malfunction is the famous zebra-stripe connector,
which sits between the CPU board and the keyboard backplane.
OT: Thanks for using the CCD OS/X :-)
I made a new version recently, with a fully implemented CCD CAT 4,
and a small function to adjust the LCD contrast on halfnut calcs.
SAVEROM/GETROM had to be removed to make room for the full version of CAT 4,
but I made another extension ROM called CCD IL/X,
which is a 'best of' of the Extended IO and Extended IL modules.
This includes MCPRP/MCLIST as well as SNEWM and MCOPY and many other IL-related functions,
and the IL/X also contains the SAVEROM/GETROM functions from the older CCD OS/X.
The new versions are not on TOS yet, but will be soon.