I acquired a non-working HP-41CV last month for parts to fix my other 41CV (leaked display).
The most interesting thing is that it hasn't the serial number engraved on the back! The reserved space is there, untouched, clean and... blank!
It appears to be older than mine (2214B03932, Brazil) and is made in USA. Is fullnut and the CPU board has a different layout and the front lower plate where is printed the name the letters are printed in bright reflective golden ink. The brazilian one is printed on a more "brownish" ink and not reflective.
This calc was toasted! I had to replace the CPU and display boards with my old 41CV. The display chips has the epoxy melted! What can cause this? Wrong batteries? (those of 12V x 4?)
Any information will be welcome.
Nelson