No Video, Both Monitors No Power BB2

[Ash100]

The other day I noticed both monitors were dark on one of my BB2 machines.

I pressed Spin and the game plays, so it's up and running.

I checked voltages at the Backplane and MPU, all present. I assumed it was a video card issue, so I swapped in a good MPU, nothing changed.

Put known good monitors in, no change.

The monitors themselves are not getting power at all.

There's a Power Distro Box on the lefthand side behind the main LCD. It supplies voltage to both upper and lower monitors. I didn't have time before work to check it, but it's about all that's left in the system
 

Has anyone ever seen one of these fail?

Thanks.

Curtis ash100

[idesign]

That power and signal distribution on the left side is just an extension of the backplane.  Try plugging the power into J16 or J22, whichever is open.


BTW, whichever is used supplies power to that location so may be the problem in the wiring

[Ash100]

Update....

Checked my voltages at J16 and J22, I have the 12VDC from the Backplane through both of those connectors on the Yellow wire. They were both populated being a BB2E.

I still do not have any 12 Volt signal coming from the Distro Box in the Cabinet behind the main Monitor.

Followed the Harness from J22 to the bottom of the Distribution Box, but it's inaccessible without removing the Shelf or Box to check wiring behind it.

Guess that's my next step.

Thanks.

Curtis ash100