HP 71B Diagnostic ROM

[Dave Frederickson]

That's makes sense. My 1BBBB went back to HP for repair. They found corroded battery terminals and a cracked flex cable. The spring terminals were replaced with the foam terminals like in the pic, above. Your 71 received new terminals and new ROMS. I'll bet that if your 71 was opened we'd find a little note from HP stuck to the HP-IL compartment, just like mine.

The cool thing about the repair of my 71 is that Duracell paid the $150 to get it fixed because it was their batteries that leaked!

Dave