Thanks for the input Askjacob & Martymachine . Problem is now fixed.I tested the "return" voltage from the globes and circut at the J-133 plug and the offending "row" had none at the corresponding terminal at J-133. Raised the playfield to check voltage at the various board plugs and had no V. Checked continuity between all these plugs and that was fine. I went searching through the loom from J-133 to under the P/F and found the broken wire in the loom as it lay next to the speaker grille(possibly been caught at some stage??).Soldered and heat shrunk. Many thanks for the reminder guys to always check the simplest things 1st, cheers Jeff