Help with air hockey digital scoreboard

[hugabone]

I just bought a used air hockey with a overhead scoreboard. The problem is both goals sometimes counts on their own, if you disconnect both goals then neither counts. I tried adjusting the sensors but eventually they will count. I think the problem is with the controller because after about forty seconds the scoreboards will flicker and it seems to really happen after the flicker. I have some background in electronics but havent dealt with it on the board level in about twenty two years. Where should I look, would it help if I up loaded the board? thanks

 

[dorke]

Please start with brand and model.
Schematics and/or service manual may help a lot.
Take some closeup photos as well and upload them.

 

[hugabone]

The brand is Strikeworth but others seem to use the same type of scoreboard but this is very similar to mine http://www.familyleisure.com/Power-Air-Hockey-Tables/Power-Play-Hockey-Table
I cant seem to find who actually makes that particular scoreboard so the schematics/service manual is out of reach. I will upload the circuit board in question.

 

[dorke]

Can you describe the "flicker"?at what rate?
Is the display readable when it flickers?
Doe it count correctly before it stars "flickering" ?

On one display board(the one without the LEDs) there are signs of something spilled.
It needs cleaning with rubbing alcohol and a cotton swab- especially near the bare wires.

There are 6 LEDs on the other board,what are they indicating?
Can you please take photos of the print side of both display boards.

 

[hugabone]

The scoreboard has two identical sides, they both will start to go dim at about 40 seconds after the timer starts, a minute or so later they will totally go out for about a split second. Once it flickers a few times the scoreboard no longer counts. It still flickers whether the two goal sensors are connected or not.

It is still readable, they just go dim then a little while later they go totally out for a bit. How can a video be uploaded here?

 

[dorke]

What is feeding power to the board?What voltage?
Is there a Power Supply?

Try touching the parts on the board,Any parts are warm or getting hot?

Have you got a DMM?
If so measure the voltage on DZ and U02(2 pins).

Don't know how to load video here,you can load on youtube or such and post the link here.