Repairing a burnt GI connector properly

Steps

• Remove the board from the backbox.
• Desolder and replace the male header pins on the board; their plating is burnt off and a new housing alone will burn again. Cleaning and tinning old pins is only a stopgap.
• Solder the new header pins on both sides of the board, lifting the header slightly so the iron reaches the top traces.
• Fit a new housing with crimp-on female pins, not insulation-displacement pins.
• For a game that runs for long hours, use black high-temperature housings; white standard housings are fine for light home use.
• Add a polarizing peg to the housing so it cannot be plugged onto the wrong header.

Systems

• Williams System 11
• Williams System 11A
• Williams System 11B
• Williams System 11C

Related tips

• Right flipper dead after a coil cooked: burnt trace on the interconnect board
• GI lamps out, game dark: burnt power supply connector 3J8 (pre-Banzai Run)
• Roulette wheel not working: worn J15 connector on the interconnect board
• Whole game flickers off and on, then dies: burnt ground pin at the power supply board
• No drop target switches register: 12 V feed lost at a loose connector
• Interconnect board from another game fitted: the values Jokerz needs
• Lamps under the slingshots out: wire in the wrong position in interconnect plug J12
• The interconnect board (Banzai Run and later)

Source: Repairing Williams System 11 Pinball 1986 to 1990, Deel 1, Clay Harrell (pinrepair.com)