Half of the dot matrix display blanks out, but only while in the diagnostic menus; attract mode and play look normal.

Pinball Magic: half the display goes blank in diagnostics (bulletin 95-017a)

Cause: The display power supply parts run hot. Capcom service bulletin 95-017a covers Pinball Magic serial numbers PB0001029 to PB0001130.

Checks

• Confirm the fault appears only in diagnostics.
• Check the game's serial number against the affected range.

Fix

• On board A0015502, swap the 1N4936 diodes at D4, D5 and D6 for MUR160 fast-recovery types.
• Take C6 (6800 pF, 100 V) off the board and leave it out.
• Replace R6, a 47K 1/2 W resistor, with a 15K 1 W one.
• Capcom recommended making these changes before the fault shows up, not only after.

The display power supply makes roughly -110 V, -98 V and +68 V. Unplug the game and let the supply discharge before touching it.

Systems

• Capcom

Games

• Pinball Magic

Related tips

• Capcom dot matrix display voltages compared with Williams
• Pinball Magic can be converted to Williams flipper mechanisms

Source: Capcom Pinball Problems/Solutions