Replaced the LCD and backlight assembly in my old Emu ESI-4000 sampler:
Which after 25 years even the LED back lighting was starting to get annoyingly dim.
Replaced it with one of these white-on-black units which works fine and looks pretty good:
Except that the software-adjustable contrast range, which was probably optimal for a black-on-yellow display, can't bring the CV up enough to avoid some "blockies" shining through. I'm wondering if there's a quick hack to get some more range. Or maybe it would be better to put a resistor in line with the backlight supply to reduce bleed-thru.
The "Turbo" board on these adds some of the nicest digital filters there were in a hardware sampler of the era: