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(Topic ID: 239077)

Bally Skateball Numeric displays all out ***FIXED***

By Seatmandan

1 year ago

Topic Stats

  • 12 posts
  • 5 Pinsiders participating
  • Latest reply 1 year ago by Ballypalooza
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#1 1 year ago

Hey guys, I just received a Bally Skateball early solid state. The game all works fine from what I can see and hear, except all 4 score displays plus the ball display are all out. Not even a glow. Again, I just got this game, I'm storing it for a friend who knows nothing about pinball. It does not have a manual.

Is there a fuse(s) to quickly check that drive the scores? I can't imagine all 5 of those suckers died at once. I'm really familiar with early mid 90s B/W machines, but this one is new to me

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#2 1 year ago

Oooh, never played one. If I come over and fix it, can I play? Where are you located?

Check the small fuse on the solenoid driver board (top right board in the head) and check the HV power supply portion on the power supply (lower right small board on the side above the transformer in the head). There are great guides for early Bally SS games. Google them for much more detail.

#3 1 year ago

thanks for the quick response! I will check that fuse asap-

#4 1 year ago

You can grab schematics for this game from if needed:

As Skidave mentioned above, you'll want to check the 2 fuses for the displays. Check fuse F2 on the rectifier board (likely mounted inside the backbox on the left or right side with the big transformer right next to it) might have a plastic cover that needs to be removed to access the fuse, which in this case is a 3/4 amp fast blow fuse.


The other one is a 3/16 amp fast-blow fuse mounted on the solenoid driver board, and may be an odd physical size (shorter than the typical AGC type fuses used virtually everywhere else). If that fuse is blown, a pair of fuse clips can be installed in the other spots on the board, allowing longer, more common fuses to be installed there.


Make sure to remove the fuses from the boards and check them with a meter.

Good luck!

#5 1 year ago

Thanks a ton for the info! I will check those 2 fuses


#6 1 year ago

One other important tip for older games that use the gas discharge displays such as this one---never *ever* unplug a display while the game is turned on. The EMF can fry all kinds of stuff. Note also you're dealing with high voltage here, so take all the usual precautions and be extra careful when conducting voltage tests etc. I know you didn't mention those things, i just like to underscore the importance of safety when working on the high voltage circuit on any machine. Let us know how it goes!

#7 1 year ago
Quoted from frunch:

One other important tip for older games that use the gas discharge displays such as this one---never *ever* unplug a display while the game is turned on. The EMF can fry all kinds of stuff.

Not to mention that YOU WILL zap yourself attempting to swap displays while the game is on. The "time saved" is not worth getting zapped. It doesn't feel good at all and there's a risk for some bad things to happen if you're not careful.

I've been zapped 2-3x times working with Bally/Stern machines, a few other times on other HV circuits in pinball, once on a floor lamp that's wire was chewed through and conducting to the metal base, once on a vacuum cleaner when I was 5-6 years old). It gets really really old So much so that on the new LED displays I'm offering, pin #1 position on the display header is completely removed.. only a 19-pin header is on the display board. No chance to get shocked on the displays themselves since only low voltage makes it to any solder points.

--- - "Pinball Inspired Technology"
NVRAM, Bally/Stern LED Displays & Mods for pinball machines

#8 1 year ago

Guys- it was a bad fuse on the solonoid driver board. Thanks for all the help!!!

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#9 1 year ago

Haha, one of the rare times you can say "it was just a fuse"

Congrats! Are you enjoying the game?

#10 1 year ago

Pretty cool game!!

#11 1 year ago

Does anyone know if this “Big ball sports” sticker was put on by Bally? it looks to have been there for a looong time, it was really hard to remove. Seems to be placed over the t-shirt of the girl

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#12 1 year ago

No, Bally didn’t put that on. Maybe someone didn’t like the special effects.

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