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My wife dropped my HP-11C and cracked the LCD. Sigh...
The screen is 3/4 black and has a visible crack. It's serial number is 2320A. My question is would the screen from an HP-12C with SN 2421A be compatible without too much replacement fuss?

Take the batteries out both units and have a look. Early units had symmetrical silver contacts, later machines had a spring on the left and a gold plated pc board contact on the right.

Within the date code range you mention, if both units share the same design battery contacts, the displays are interchangable.

Quote:
without too much replacement fuss

If it's your first time inside a Voyager, it is *not* an easy task. Even after having done dozens of these exchanges over the years, I still dread them, it is one of the most tedious repairs you'll ever encounter.

Thanks for the info, Randy.

If I can save the 11C then the effort will have been worth it.

Cheers