I bought a 73 from a pawn shop years ago and it started doing wierd
stuff right away . I found several cold solder joints here & there ..
been working fine ever sence .

My 83 shortly after new started goofing up . It was the rubber thing
that connects the screen . Later it would start making chirping sounds
when turned off . That was a switch on the back of the circuit board .
This meter sits in a desk drawer and seldome gets used , it still looks
like brand new . I thought Fluke was bullet proof .