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22s key malfunction?



#2

I have purchased a second-hand 22s after having lost my first one. The one I have now is an earlier model than what I used to have. The problem: whenever I press the "C" key (the clear key), if there is no action for the calculator to take (clearing a register, exiting a menu, turning off, etc.), the calculator freezes and must be reset. Other than that, it seems to work fine. In short, if I press the "C" key when I really don't need to, the calculator quits. Is this a normal quirk of older models? Is it the start of a progressing problem? Do I just have a calculator with a unique personality?

Thanks

CJ


#3

Nothing truly unique, you just have a calculator with a defective keyboard :-( It's probably not the C key as others tend to fail first.

Look for any keys that roll around inside the frame like a loose tooth - those would most likely be the actual cause of the problem. The numeric pad keys are a prime candidate as well as the basic four (+-*/). If you find any, there is no solution other than replacement. If all appear okay, it might be brought back to life for a while with several passes through an ultrasonic cleaner to get whatever contamination it might have out of the one or more of the keys.

Overall, not a good prognosis. Sorry for the reality check.


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