You sound quite a bit like me- a real multi-platformer! I too have an Atari
800, Atari 800XL, TRS-80 model 3, model 4, model 1, Coco2, Coco 1, Commodore
64. Plus numerous disk drives, tape drives, printers, plotters, and modems.
I've had the same experience with keyboards, the only problems I've had have
been with the Model 4 and the Atari 800. The Atari clears up very quickly if
I give it a good workout like typing in a program from a magazine. The model
4's got so bad I pulled a keyboard from an extra model 3 and have been
getting by with it (no control key, no function keys 8-).
I've been meaning to snatch one of those from Computer news80, they have new
ones for $15.00 but I'm very cheap and very lazy when it comes to mail
>>So I acquire this nice TRS-80 Model 4 with 128K. It works, except for this
>>annoying keyboard problem. The key action is good for all keys; they go
>>with a minimum of pressure and spring back up very quickly. The problem is
>>that some keys have to be pressed _very_ hard for the computer to sense
>>keypress -- so hard that it noticeably bends the keyboard PCB each time.
>>I'm thinking that there could be a bad solder connection somewhere on the
>>keyboard PCB, that the connection is made when the bending of the board
>>causes the correct leads to be brought into contact with each other. How
>>far-fetched is this?
>>What else could be causing my problem? Google has not returned anything
>I've got a Model 4 where every key worked. Didn't use it for two
>years, kept it in a spare bedroom... Finally got some tables to setup
>my computers for display, and most of the keys didn't work. Found same
>issue you did. If I press hard (or tap them hard), they work.
>Eventually, many of them kept working. Must be oxidation at work here,
>and the repeated use cleared up the trouble with the exception of one
>or two keys. I suspect if I used it daily, the trouble would
>Some of my systems fared better. The Apple IIe for example NEVER
>exhibits a problem nor does my old 386, that were both stored in the
>same room. Neither did the Commodores or Tandy Cocos, but the Atari
>800 has ALWAYS exhibited the problem if I don't use it constantly.
>My TIs generally exhibit the problem for a few minutes, but then are
>The 4p on the other hand has never had a problem...