Gorgar System 1 board not powering up at all
My 1979 Williams Gorgar won't power up at all. When I flip the power switch, absolutely nothing happens — no lights, no sounds, no relay click, nothing. The wall outlet is fine (tested with a lamp) and the power cord is plugged in securely.
I opened the back of the machine and I don't see any obvious signs of damage — no burnt components, no melted wires that I can see. The line fuse in the transformer area might be blown but I'm not sure how to test it without pulling everything apart.
This is my first vintage machine and I'm a little intimidated by the older electronics. I'm comfortable with basic electrical work but I've only ever worked on newer Stern games before. Is there anything especially dangerous about working on System 1 boards compared to modern games?
yemons·3/21/2026★ 1 Answer
Critical safety warning: Williams System 1 machines operate with exposed high-voltage AC throughout the backbox and cabinet. The power supply generates unregulated voltages that can exceed 200V DC on some test points. ALWAYS unplug the machine from the wall before touching any internal components. Even after unplugging, the large filter capacitors can hold a lethal charge for minutes — use a discharge tool or a resistor across the cap terminals before working near them. If you're not comfortable with high-voltage work, please consult an experienced pinball technician.
With nothing happening at all on power-up, start with the basics: check the line fuse in the transformer box. On Gorgar, this is typically a 5A slow-blow fuse located near the transformer in the lower cabinet. Use a multimeter to test continuity — don't rely on visual inspection as glass fuses can look fine but still be blown. If it's blown, replace it with the correct value (never upsize) and try powering up again. If it immediately blows again, you have a short in the transformer or the primary wiring. Check the power cord, the power switch, and the wiring from the wall plug to the transformer for any damage, breaks, or bare spots.
If the line fuse is good, check the transformer itself — measure the AC voltage at the primary (input) side with the machine plugged in to verify power is reaching it. If power reaches the transformer but nothing comes out the secondary (output) side, the transformer windings may be open. Replacement transformers for System 1 games can be found at Marco Specialties. Also check all the fuses on the power supply/rectifier board — on System 1, there are multiple fuses for different voltage rails. A comprehensive fuse kit from Pinball Life is cheap insurance. If the machine has original components from 1979, I'd strongly recommend doing a full cap and connector rebuild on the power supply and driver boards as preventive maintenance — 45-year-old components are living on borrowed time.
yemons·3/21/2026