Hi
I read about that problem and it's usually the battery. On my WW I don't have 3 conventional batteries (don't know how it's call) nothing seems corroded or cracked.
Is these batteries can die like usual batteries?

Once I start the game, it pops 4 times this error and the screen dies. I can't access the service.
Any advices?
Thanks

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I might sound stupid (people assume when you have 30games+ you know what you do, I measure 3,67DC from the + and - of the battery. Am I correct?

Diagnostic blink once and +5 VDC stays solid

But the adjust failure error doesn't appear now. Black screen with only the GIs.

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The game starts with a knocker noise.

Where is the game rom button when you say press on it? Thanks!!!

Pfff this game has been my nemesis for sometimes.
A guy repaired the video board. No success. I swap brand new pinscore display and video board. No success. I changed the ribbon cable for a new one. I now know sometimes these variable work cause it flashes the "failure" error once in while. Sometimes the knocker will knock.

I had this game for years. Actually my go to game for a quick fix. A sysyem11 tank. Now it's been a nightmare.

Fuses are good. I reseted connectors, pushed gently roms. Maybe I need an Exorcist

I changed my weird battery for a usual remote batteries system.
Adjust failure is still there at start up and the 5volt led is solid, diagnostic is blinking and blanking is solid.
If I go into the service, diagnostic and blanking don't light anymore, the knocker goes on 1 time and the screen dies.

Is it good news?

Back square one.
The game now only boot with the starting sound and nothing else. Only 5volt led is lighting. Screen is dead and no more adjust failure. It's worst than ever
Batteries are good. A measured them also on the board to be sure.

I tried everything I could read about the coin door open or close.

Can you show me where is D2 and how to measure it?
Thanks

I get 0.635 foward and 0 on reverse.

So it's good

Where is the 5v rectifier and how to measure it?

Thanks again

Thank. Really interesting.

I also read a low voltage on the 5volt led (1.6v). Both Diagnostic and blanking are dead.
I swap my WW power board for a brand new pinscore I had in BK2k. I know this board is working. No success.

Where the voltage is dropping?
(WW power board is working great in BK2k)