Problem - Bally 7 digit score display on player 4 is flickering. Almost like it's strobing brighter and darker throughout the segments.

What I've done already - I reflowed solder on the header pins along with the glass display pins. I've done continuity checks on all associated work. Everything checks out. I've tested the transistors which all fall within .5 to .6 ohms. All the resistors look fine. No burning. I've swapped connectors with the player 3 and it still does the same thing. Also, I've connected player 4's connector to player 3's display and no issues. The problem is isolated to this display. My final thought is that the glass is just shot.

I would appreciate any other suggestions prior to just ordering a new display.

The driver and mpu are alltek. I can plug the connector into any other display and it works fine. The problem is within the display or its board. The display technically works but gets dim then just slightly brighter but never as bright as it should.

Tested fine. Other than taking the chip out and testing it in one of those cheapo chip testers (which sometimes work and sometimes don't), I don't have the tools to test a chip.

Look pretty clean.

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Issue resolved. It was the 4543 chip. New one socketed and installed. Thank you to all that responded. Saved me from buying a Pinscore.