Sounds like your CPU took a hit.

Anything that is on it socketed, gently see if they are in tight.

LTG : )

I would hook everything back up on the power board. That shouldn't have anything to do with booting. The CPU board sounds like it did boot ok since the lights are flashing. How do you determine the machine won't boot? If your av board is dead you won't have video or sound. But the playfield lights will come up. You can also swap boards (as long as you swap roms) between your two wpc95 games.

So my suggestions:
1) hook everything back up.
2) reseat all ribbon cables
3) report back with specifics explaining what "will not boot" means
4) disconnect ribbon from CPU board that goes to the av board. Do the playfield lights come on?
5) swap boards between the two games until you isolate the bad one and we can go from there.

Why not ? Crap happens. New board or repaired board.

LTG : )

So no display and no sounds is caused by a bad av board.
No GI lights - these won't light up because you disconnected them.

The CPU is booting based on the blanking led flashing. The rest is impossible to determine state because you unhooked everything.

There is no reason to have all those things disconnected from the power board. That has nothing to do with boot. If you can't take any of the steps I suggested then we can't get any further debug info and I'm done. Good luck.

Also have you checked all the fuses on the two AV boards? My rottendog one shipped with the wrong fuses. They were 10x too weak. They should be the same fuses used in the Williams board.

If the AV board is bad, the game may still boot up but with no video or sound. the only indicator this happens is the lights in the playfield. You can see it enter attract mode. But since you unhooked everything, we cannot see that happen. You have strongly assumed your AV board is fine and refuse to move past that. It's not possible to help you in this case as no further debug data can be received. In order to fix a problem, it has to be debugged. You can't just shotgun fixes.

I have suggested several ways to move forward:
- put a "you say its working" av board with its roms swapped into the other working wpc95 game. You say your av boards are both fine. Then what's the problem? Prove it. I personally think the issues are in the AV boards. But there's no enough data to prove it for sure. Swapping boards into other systems proves it.
- hook up the rest of the connectors so we can see what's going on in the playfield

I will stop responding to this thread until something is done to gather more data. Good luck with your repair. Hope you figure it out.

Easiest check here is whether the data ribbon cables are connected correctly.... It is hard to see sometimes and very easy to think it is connected when in fact it is 'off' on one side etc. Markmon gave the tip (item 2 on his checklist).

So my first advice is to just hook everything else up. Don't swap boards yet. Let's see what happens then. I assume the game will enter attract mode with no sound or video. If not, report exactly what does happen and the state of the CPU LEDs in that test.

If the CPU LEDs enter the state you reported where the activity led is flashing, that means the CPU booted up. If the cpu leds don't enter flashing state then we should unhook only the two ribbon cables at the top going to the av board. Then test that the game enters attract mode.

Once we are at this point we can determine if it's time to swap boards or what.

Hope that makes sense.

I had a game with a similar issue. I unplugged the ribbon cables from CPU board and powered up. My CPU booted ok so I powered down and plugged one ribbon cable in at a time and powered on. In this case the display driver board was the problem.

Changing too many variables at once makes it harder to troubleshoot.

WMS changed the AV fuse values later in the run. Compare Congo, AFM and MB manuals.

But certainly not by a factor of 10, right?

No, not 10x. .25 amp to .315 amp

The av board has 4 fuses. Two are .25a and two are 2.5a. On the rottendog I got, all four were 0.25a.

Markmon,
Following this similar issue except I have lights and video.
What do the LED lights mean on the CPU board.. on my TOTAN. as described above bottom LED constant ON, middle flashes, top LED off... is this normal?

Getting ready tonight after work to have some one walk me thru the voltage and pin connector checks.. this is all brand new to me.

Thanks.

I had the same issue except the middle light was off. Found a resistor that had corrosion and eaten it almost in two right under the battery holder. Replaced resistor and problem solved.

If the middle is flashing then your CPU has booted up. I suggest you start a new thread with "TECH: " in the title and describe your issue in as much detail as possible to get a bunch of eyes on it.

Right, the 2.5 amp fuses stayed the same... but the smaller ones went from .25 to .315

Yes, feel like an idiot.. of course the manual explains the lights.. sound dongs I'm experiencing.. and have another more experienced helper walking me thru how to use DMM to do all correct checks and isolate problem.
I will post a new topic once I get going in next few days, but thanks!