Have you used your calculator for something that was not really math related?

[ttw]

I mentioned this here when it happened (probably on the Prime subforum). I inserted the usb cable into the Prime then put the other end into the usb port on the computer. There was a flash and the computer was dead. Some searching on the internet claims that this is not uncommon (not necessarily just with the Prime) when trying to power a device from a computer. It seems that the protection on the computer and the device may not be enough to prevent a short. It was a shocker.

Thus I did order another HP50g (which is bein used so much that the letters are wearing off) for preliminary work (successful ideas transferred to the PC).