thanks for the comments and ideas guys..
I swapped the Bcd chips to see if the 88888 fault moved ,
and cycling the chips in and out of the sockets fixed that issue,
I removed the Master display board and tested all resistors etc and looked for dry joints,
found a few possibles but didnt fix the missing segments unfortunatly..
Wonder if it originates from the Cpu board on the display drives plug connectors?
