Hey Everyone

So I'm new to this whole process, so please bear with me.

I recently acquired a Gottlieb Spiderman 80 pin. Overall works great. I went ahead and replace some burnt out lamps in the behind the back glass and installed some leds in the playfield. After I closed the playfield and reinstalled the glass i booted it up. Everything worked great, however, the sound started to have a muffled effect....for lack of better terms. After a few days it cut out, made a high pitched squeal randomly, went back to working normal, went out, on and on. I changed all the fuses behind the coin box to make sure nothing was old or blown. Same issue persisted. The sound would work, go off, work, go off, and then while it was just on with no one playing it... it started making a sound like a dial up modem.

I'm thinking, with my limited comprehension of these systems, it could be a grounding issue, blown fuse somewhere, blown speaker or bad sound board. I'm leaning towards grounding since it comes and goes but these systems are known for grounding issues to begin with. I watched Todd's Tips and saw how he did the ground behind the backglass for the Gottlieb 80 system. The ones i can find online are $200 so trying to save some cash. Seems pretty easy. However I don't have any extra harnesses or wires laying around. So that leads me to my questions

- Does this sound like a grounding issue?
- Is there a wire I can buy at Home Depot to use as a ground for the harness as he describes?
- If so what gauge?

I apologize for all the questions but I'm very new to the pinball systems. I'm familiar with other computer repairs, midlevel electronics, and coding... but I always seek advice to make sure I understand what exactly is going on.

Also, if anyone in the Orlando area is familiar with this stuff and is willing to teach me and give me a hand I would be glad to compensate you for your time.

Thank you

#TheAmazingSpiderman #Gottlieb #Audio The Amazing Spider-Man #Sound #Grounding

The power supply was changed prior to purchasing by previous owner. They supplied me with the receipt. So when I get home and take off the back glass and look behind the board what should I look for exactly? I know where the problem should be after looking at the Todd Tips video.. but any insider info would be appreciated. Or images. Im new to this... so please bear with me.

Awesome. Thank you. Ill try that and hope thats the problem

So just to followup...

Went home and checked behind the back glass. Everything looked fine (images attached). After checking all the connections there I opened the playfield and tightened all the ground around the volume control. So far, that seems to have fixed the issue. So I assume there was a loose ground around there. Will followup if problem persists. Hoping that was it. If not may start replacing boards...and maybe move to a Pascal all in one for ease of use and funds.

Thanks everyone

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