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Thought I'd put this up for future reference as I hadn't experienced it before and could save someone time and head scratching.
Turned on FT, found only 1 string of GI was working in the backbox. None on the playfield.
All fuses fine. Reseated J120/121/115/ribbon cable from CPU to driver.Checked voltages at J115 - all showing around 7 VAC so knew power was getting to the board.
Seemed weird that suddenly 4 out of 5 strings would disappear.
Swapped in ribbon cable (CPU to driver board) from another game. Bingo - All working again !
Turned on FT, found only 1 string of GI was working in the backbox. None on the playfield.
All fuses fine. Reseated J120/121/115/ribbon cable from CPU to driver.Checked voltages at J115 - all showing around 7 VAC so knew power was getting to the board.
Seemed weird that suddenly 4 out of 5 strings would disappear.
Swapped in ribbon cable (CPU to driver board) from another game. Bingo - All working again !
