Lighting & Score Display Problems on Atari Superman.

This past June I purchased ea non-working Superman machine that sat for a few years but looked in great shape. I got it home, put it back together and to my surprise it worked just fine. After some restorative cleaning, new rubbers, play field repairs and bulbs it was 100%. What a great find and a lot of fun to play. BUT...... And there’s always a but; right?

Out of the blue, after a hour of play today, I sprayed the coin mechanisms with “quick drying Electronic Cleaner Spray”. (Did I mention that I’m NEW to this hobby?) Immediately after I sprayed, I noticed the following:
- on the back glass; all four player score displays went dark but the back glass illumination bulbs stayed on.
- under the play field; all lights went dark.
- above the play field; all of the lights stayed on.
- the “test button” behind the coin door does not put the machine in test mode.

So... I have no idea what happened.
I checked the continuity on fuses 3, 4, 5, 6, 7.
I didn’t smell anything burning.

If anyone has any basic suggestions to help me debug this problem I would love to hear from you.
Thanks in advance....

I did some more looking and reading and found that if the game is not going into test mode, then to check my LED lights on the PCB board. (See picture below of service manual page 1-7).
Of L1, L2, L3 and L4 lights; when I pressed the self-test button on the inside of the coin door;
—- L1 is ON,
—- L2 is off,
—- L3 is flashing,
—- L4 is flashing.

If I understand what I’m reading (I’m new at this), that’s telling me that my J6 and K6 RAM are bad.
Hmmmmmm. Anybody think I should go ahead with replacing those as a first step, or am I missing the boat here?

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Yikes. Thanks for the reply. It’s nice to know that this forum is responsive. Thank you!
Well here’s an update on my dilemma.
- actually sprayed it with the power “OFF”. But I turned it on only a minute or so after that. Why I sprayed it... The wiring looked dusty (newbie mistake).
- do you think the spraying might be a red herring? Or do it think it may be the cause?
- nothing else, other than the coin mechanism got sprayed.
———-
Update on the red LED test lights on the PCB board.... I read the lights backwards. They are actually numbered right-to-left.
So:
- L1 is flashing
- L2 is flashing
- L3 is off
- L4 is on steady
Which is saying that RAM H6 and J6 is bad.
———-

I’ll do a thorough cleaning of the coindoor wiring and let you know what changes.
Thank you for the suggestions.

ForceFlow —- I did a thorough cleaning of the coin door wires and connections. Nothing Changed.
I did try to bypass the RAM test (holding the test button and credit button at the same time) but nothing changed. However, the 4 LEDs showed this during the bypass attempt: L1, L2 and L3 all go dark and L4 flashes. ☹️

Retro pin —- When I get my machine up and running again, I’ll be sure to look at the normal condition of the four LEDs and report back to you.

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