SONY PFM-41V1N Mirrored Image (PDP42V5 PARTS)

[waxhead]

horizontal mirrored image on screen. plus the zsus board squels like mad.

when i disconnect the cable at the bottom of the board as shown. image on screen is fine but a dark picture, plus the squelling stops.

board had a blown capacitor (C16) which was replaced but no change.
do you think a Z sustain replacement would resolve it