Quoted from JodyG:
I have a system 80B display that is showing some ghosting of the display segments not in use. It appears the be the display itself, as it follows the display to other games. I did replace the small capacitors on the display board, because they were testing questionable... But that did it fix it. Any ideas?
Yes, we have already seen this on one of the displays that we repaired. This comes from the display board itself.
The problem came from 10941 (the small chip) which had too much latency, and the solution was to replace it.
Check anyway before changing it that there is no short circuit, or dirt on the PCB, especially at the SCLK-DIS and DATA-LOAD pins (1 and 40 of the 10939, and 23- 24 of 10941). If necessary, clean the welding side with acetone and alcohol. If it does not improve anything, then the 10941 is faulty.
Finding spare 10941 (R10941 from Rockwell, or MIC10941 from Micrell) is now quite difficult, and prices go hand in hand.