Warlok (Williams, 1982): Troubleshooting and System 7 Replacement Boards
Is your Warlok by Williams has spinners that don't register, won't start, resets, or crackling sound? These symptoms are typical of Williams System 7 pinball machines whose original boards (MPU, driver, power supply) are now over 40 years old. The good news: the WillFA7 replacement board, Plug & Play and battery-free, brings your machine back to life.
Warlok (Williams, 1982): Overview
Released in 1982, Warlok is a System 7 machine whose playfield is based on Blackout (1980), with spinners (about 412 units).
- Manufacturer: Williams
- Year: 1982
- Electronic system: Williams System 7
- Type: solid state
- Theme: witchcraft / fantasy
Common Issues (System 7)
On Williams System 3 to 7 pinball machines, recurring failures stem from aging: leaking NiCad battery on the MPU (corrosion — the #1 cause of dead boards), worn 40-pin MPU-to-driver connector (the single most common failure point), resets/reboots from 5V drops (power headers and connectors need re-soldering), tired power supply capacitors, displays with missing segments, and solenoid fuse blowing (stuck slingshot or pop bumper).
Warlok-Specific Issues (Forum Reports)
- Spinners (returns) no longer spin freely or register: inherited from the Blackout playfield; clean and straighten them, check the switches.
- Paint wear at the center of the playfield: a heavily stressed zone; protect or restore (NOS playfields exist).
- Leaking battery on the MPU: trace corrosion — the #1 cause of dead System 7 boards.
- Intermittent 40-pin MPU-to-Driver connector: bad contacts to redo with trifurcon pins.
- Resets on 5V drop: power connectors and capacitors to rework.
- Absent or crackling sound: the Type 2 sound board to diagnose.
Compatible Replacement Boards for Warlok
- WillFA7 — 2-in-1 board (MPU + Driver) compatible with System 3 to 7 (System 7 included).
The WillFA7 replaces the original MPU and driver board (startup, logic resets, solenoid control, battery-free memory) and eliminates the fragile 40-pin ribbon cable. Purely power-supply issues (5V/12V, capacitors, power connectors) and the sound board are addressed separately; our support team can guide you.
Installation is Plug & Play, battery-free, with tutorials and free support. Contact us.
FAQ — Warlok Williams
My spinners don't register.
Inherited from the Blackout playfield — clean and straighten them and check the switches. On the logic side, the WillFA7 stabilizes switch reading.
My Warlok resets on 5V drops.
Rework the power connectors and capacitors. The WillFA7 replaces MPU and driver, battery-free, and eliminates the 40-pin ribbon.
Do I need to keep the original battery?
No. The WillFA7 runs without a battery and eliminates the #1 cause of corrosion on System 7 machines.
How long does installation take?
Installation is Plug & Play: just a few minutes, no soldering required, with tutorials and free support.
Does a battery-free board retain settings and high scores?
Yes. Modern replacement boards use NVRAM: no battery, no corrosion, and settings are preserved when powered off.
Step-by-Step Diagnostics
- With power off, visual inspection: look for any signs of battery leakage or corrosion on the MPU of your Warlok; remove the NiCad battery if still present.
- Power supply: check the 5V rail and fuses; re-solder power supply headers and MPU headers if voltage drops or the game resets.
- Connectors: re-pin oxidized Molex connectors, especially the MPU-to-driver connection.
- Solenoids: check solenoid fuses and switches (stuck slingshot) before powering back on.
- Displays: never connect or disconnect a display while powered on; test with a known good display.
- Final test: verify startup, credits, solenoids, and displays; remember the WillFA7 replaces MPU + driver. If needed, contact free support.
Useful Guides
- How much does pinball machine repair cost? A price guide
- How much is my pinball machine worth? Value and estimation
- Pinball machine leg sizes: the complete guide
- Which board for a Williams System 3 to 7?
See Also
- Cosmic Gunfight (Williams, 1982)
- Varkon (Williams, 1982)
- Barracora (Williams, 1981)
- Blackout (Williams, 1980)
