Have you done any work to the power supply? Usually the 5V filter cap is 30+ years old and needs to be replaced. Personally I like replacing the header pins for the 5V/12V plug while I am at it. Either of these having issues can cause random resets.

Also check the slam tilt contacts under the playfield and behind the coin door to make sure the contacts are not too close together.

maybe you have put to many light bulbs to decorate your house for Christmas and the VAC mains are low
check the mains 110 vac first to pinball outlet

Check the diodes on the flipper coils too. If one falls off it will introduce a lot of noise and may crash the game. Otherwise i would suspect a power supply issue since you have a new mpu/driver.

Watervillain,

Can you help me out here? I am having the same problem with my Goragar that you were. I also have a combo board from Rottendog in my pin. It will just shut down when playing a game, I am confused as to what I need to do here. See below.

Thanks,

Jay

I then took the path of easiest solutions and wiggled all the power connectors from beneath the playfield to the backbox. And believe it or not, I haven't had Gorgar shut down since.

If only all our problems were so easily solved!!!

If you wiggle power connectors and that "fixes" the problem - then you know that the connectors need to be repaired.

Just like if you push chips down into their sockets, and that "fixes" the game - you know the sockets need replacing.

Vid 1900,

What do the power connectors look like under the Gorgar playfield, that Watervillian wiggled? What is the blackbox that he mentions, as well?

Thanks,

Jay

the Backbox is the box on the back of the game where the score displays are located.

Open the backbox with the key and carefully lift up the Backglass and tilt it out (don't scratch the back of it, it's VERY fragile).

There is a metal lever on the right hand side that you lift, then the display/light board will swing out.

Behind the display board is the Power Supply with the connectors.

http://pinside.com/pinball/forum/topic/vids-guide-to-bulletproofing-williams-system-6/page/2

You will also need the manual:

http://mirror2.ipdb.org/files/1062/Williams_1979_Gorgar_Instruction_Booklet.pdf

And the schematics:

http://mirror2.ipdb.org/files/1062/Gorgar_Manual.pdf

Thanks vid1099, I know what you are talking about. When I hit both flippers at the same time, my game will shut down. I have owned this pin for 25 years, and this is the first time I have experienced this. I have a Rottendog combo, MPU, driver board in my Gorgar.

Jay

If you have not changed it in 25 years, it could well be the big capacitor on the power supply.

12,000uf 20v

There are a few other things to bulletproof on the power supply while you have it out of the game:

http://pinside.com/pinball/forum/topic/vids-guide-to-bulletproofing-williams-system-6/page/2

sys6ps.jpg