Hello,
I recently acquired an HP41CV with two modules. The original owner reported that the calculator and modules no longer worked but had worked before. They stopped working, in stages, as he installed and uninstalled the modules.
I suspect he had forgotten to turn off the calculator before installing and uninstalling the modules! Both modules work just fine in my own '41CV. I have not opened the calculator yet as I expect the damage to it is, therefore, electronic rather than purely physical.
Is there any way to repair such damage?? Unfortunately, the calculator is a half-nut, otherwise I would consider converting it to a '41CL.
Thanks for any advice or guidance.
... Martin