Monitor Troubleshooting

[nmd4557]

Hi all,

I have recently come into possession of some arcade machines in fairly good shape.  I will tell up front I am not very good troubleshooting monitor issues.

I was hoping maybe you could point me in the right direction with this issue.  Basically, I power on the unit, the image comes up on the screen (WG 19K4961) and I notice near the bottom of the screen there is black area forming a small peak from the bottom up (about 3 inches up into the screen).  Right next to the black area is a dark shadow covering roughly a third of the way up the monitor.  The black area almost looks like the result of a broken area in an LCD screen.

I am considering this may be a problem with the voltage regulator or the blanking circuit.  I haven