During play the game tilts whenever any switch in the same matrix row as the tilt is hit (here the right feeder lane rollover, right pop bumper and treasure chest saucer). The switch diodes test fine.

Hitting switches in one matrix row tilts the game: bad capacitor on the tilt bob

Cause: The small ceramic disc capacitor across the plumb bob tilt switch had failed, so activity on that row registered as a tilt.

Checks

• Use the switch matrix chart to find which switches share the tilt's row and confirm the fault only happens with those.
• Test the switch diodes in that row out of circuit.
• Check the wiring from the MPU row pin to the switches for a short, and look at the parts on each tilt switch.

Fix

• Clip out the capacitor on the tilt bob switch (replace it if you want it fitted); here the switches all worked properly afterwards.

Systems

• Bally MPU AS-2518-35

Games

• Paragon

Related tips

• Pop bumper or slingshot fires by itself; random tilts
• Tilt doesn't work and closing it fires a pop bumper: dirty slam tilt switch
• Rollover switch only registers with two diodes fitted: failing PIA at U10
• Pop bumper fires on its own when a flipper is used: replace its switch capacitor
• What bad switch diodes do to the matrix
• Stand-up target always closed in test and ghosting another: failed switch capacitor
• Switch reads stuck closed, or a pop bumper chatters
• Several playfield switches drop out together: worn insulation shorting the start button

Source: Pinball Repair help group!! (Facebook group)