Black Widow wants to play in the dark

[ckong]

Guys, I have a small problem with Black Widow and that is that the game plays blind. I know that the chassis is working because the 2 leds on the LV2000 light are on and there is neckglow. I can start and play a game, just in the dark, the screen remains dark. I checked all connectors and the neckboard, but didn't find anything strange. What is next to check?

[ckong]

OK, I could use some technical input here.    I powered the game again today and increased the screen pot a bit. This is what I then see on the tube, a blue-ish line:



which after a second or so became just a dot:



??

I quickly turned down screen again. Here is a picture of the chassis:



It has the LV2000 light installed. Could this be a cause for the problem? I don't suppose so.

[ckong]

OK, let's get out the WG chassis and do a visual check. Hm, this isn't good, 2 wires broken loose from the PCB!



Will resolder them and then see what happens.

[Laszo]

OK, let's get out the WG chassis and do a visual check. Hm, this isn't good, 2 wires broken loose from the PCB!



Will resolder them and then see what happens.

Well an easy fix.... Just put them on the right spot 

[ckong]

Indeed, easy fix, resoldering the wires. Unfortunately it didn't help, the game still has the same issue. 

This will need further investigtion.

[pobtastic]

The first thing to check is that you have 180V on pin 5 of P900, next check you have +/- 28V on pins 1/8 of P900.  It'll narrow down exactly what needs replacing.

[ckong]

Thanks,  I will do that.  I found an error diagnose chart which I am planning to follow and that suggests the exact same thing to check.