Unexpected items found inside calculators?

[carolinahomes]

I don't see a post anywhere about this, if there is one, please direct me to it...

The topic is: What unexpected items have you encountered when you've opened an HP for repair?
Today I found a tiny folded up slip of paper with the serial number typewritten onto it. I assume that this was due to a prior service repair made by HP early in its life because I also noted that the small board had a date code that was 22 weeks newer than the rest of the unit.

Your turn now, tell me what you've found, I'd love to read it all!

-- Jessica