WPC-95: a dark +20 V LED at TP104 means the flasher supply is not leaving the board
If the +20 V LED by TP104 is out while its fuse is good, look for a cracked solder pad on that supply's filter capacitor; jumpering diodes to capacitor cures it.
Systems
Related tips
- WPC-95 LED102, LED103, LED104 or LED105 off
- WPC-95 driver board LEDs and test points
- +20 V filter capacitor C11 (C10 on WPC-95) blows apart
- WPC-95 rectifier diodes, filter caps and fuses by supply
- WPC flashers and coils all dead? Check the coin door interlock first
- WPC-95: all the 20 V coils dead, fuse good
- Shorted or open bridge rectifiers
- WPC-95 LED101 off (+5 V, game will not boot)
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Two, Clay Harrell (pinrepair.com)