I have an HP-67 calculator that has been working great for years. I bought it on ebay from Mike Davis back in 2002 and up until just recently, it has seen little use. I decided this year to sell it. I felt it wasn't getting the proper respect it deserved since I aquired an HP-41, and it would be better off in the hands of another collector. When I got it out, I was dissapointed to find the card reader didn't function.
I'm going to summerize a long story: The calculator would pull cards through ok, but would emit a slight screech at the end of the read (like it was still trying to pull a card through when there was none left) and would display "error." First I suspected it was the "gummy wheel" problem, but I found the wheel wasn't gummy in the least. Then I looked into some guides online, and decided that the clutch must be going out. I used Mark Hoskins guide to repair the clutch via the less than ideal (but only method I could manage) super-glue method. The motor now feels and sounds (is more noise good?) like it has signifigantly more power, but still fails to read and write. I'm pretty novice at these repairs, and don't have a clue what to do beyond this point.
It seems to pull cards through fine, but entirely fails to read/write data to/from the card. I'm at my wits end. Any idea what could be the problem, or where I should even start to look?
Your help appreciated,
-Erin