Monitor fried - isolation transformer and marquee light to blame?

[bluevolume]

I got word back on my fried monitor chasis, and the question was whether I have run the monitor without the isolation transformer.  I know not to do that, but it motivated me to take a closer look at the wiring inside the cabinet.  The way it is wired, everything is powered through the transformer, including the marquee light (flourescent), and it looks like the marquee light wire connections aren't original (they are connected with snap-n-splice connectors).

Could this be part of the problem?  Is anything in the cabinet supposed to be running off of the transformer other than the monitor?

Also, if I somehow did run the monitor (25" k7000) without the transformer for a few seconds what damage would it have caused?  Would it fry just the board or the tube as well?

[cw]

its common to see the light running through the iso with the monitor power

[SirPeale]

its common to see the light running through the iso with the monitor power

But not correct.  The only thing that should be attached to the OUTPUT of the iso is the monitor.

[bluevolume]

its common to see the light running through the iso with the monitor power

But not correct.  The only thing that should be attached to the OUTPUT of the iso is the monitor.

Thats what I was thinking, thanks for the confirmation.  The way this cab is wired, both the marquee and the PCB were powered by the transformer.

[cw]

the power to the marquee light runs from the iso transformer on most if not all of my cabs.  They might not be on the same leg but they do run out of the transformer. 

[Ken Layton]

the power to the marquee light runs from the iso transformer on most if not all of my cabs.  They might not be on the same leg but they do run out of the transformer. 

It may be wired that way but it is not correct and it is NOT SAFE!

Let me say this once again for the millionth time:

Only the monitor should be connected to the output of the isolation transformer.

[cw]

this shows the monitor power on one leg of the transformer and the marquee light fixture power on the leg right next to it.   Was this an older standard that is no longer safe? 

http://arcarc.xmission.com/PDF_Arcade_Manuals_and_Schematics/Pooyan_Schematics.pdf