I've had one apart several times and never found an internal fuse. I'd
consider your unit officially fried.
System is 5 volts and 12 v would be fatal.

Bob

"quietman" wrote in message
oups.com...
I hooked BOTH (don't ask) of my compaq aero 1550 pda's up to 12 volts,
directly...
...neither works at all now.

Before I bust 'em open and start digging around in thier innards, does
anyone know if they have a fuse, where it is, or any other hints...

thanks,

john roe, "zr"
www.roenation.com