The game reports Check Fuses F106/F101, the lamps are out and a game won't start. LED100 and LED102 on the power driver board are off and F106 is blown.

Check fuses F106/F101 with no lamps and no game start: shorted bridge diode

Cause: One of the four rectifier diodes (D11) feeding that supply had shorted.

Checks

• Test D11 to D14 in diode mode; a diode reading zero both ways is shorted. Confirm with an ohm reading.
• Replace F106 only after the short is fixed, or it will blow again.

Fix

• Replace all four diodes D11 to D14 and the F106 fuse.

Systems

• WPC-95

Games

• Attack from Mars

Related tips

• Shorted or open bridge rectifiers
• WPC-95: all the 20 V coils dead, fuse good
• Supplies made on the WPC power driver board
• Replacement bridge rectifier and diode ratings
• 12 V unregulated LED out on the driver board: open track to C8
• WPC-95 uses discrete P600D diodes instead of bridges
• WPC-95 rectifier diodes, filter caps and fuses by supply
• WPC-95 LED102, LED103, LED104 or LED105 off

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