HP 41CV repair required


Can anyone help please?
After 29 years of use my HP41CV seems to be broken?!
A few weeks ago, the display went erratic but that resolved itself after I opened the casing slightly to look inside (and then thought better of it and closed it).
Now, when I press 'ON' the calculator just beeps once and the display is blank.
Is there a simple solution to this that I am missing?
If not, then does anyone provide a repair service?


Hello Geoff,

try this simple procedure.
With the calculator switched off press: [BACKSPACE]+[ON]
If it doesn't work at 1st try a few more times.


Removes the batteries and leave 12 hours. Did you use some module? Synthetic programming? Old batteries?

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