If I desoldered the line going from the flyback to the board I could verify if the flybacks actually sending 30V to that circuit yeah? And from there if it is it would just be following along the circuit checking components until I found the bad one(s) right?

Ok, so I tested for 30V on the cathode side of X609 and I'm getting -.029VDC. I then tested positive for continuity between pins 4 and 6 on P607.

ok, no 30V at test point 82. Checked X609 and I'm getting 0.46 one way and 0.0 the other. Tested R631 and am getting resistance but i tested in circuit.

Thanks Ian! I'll check those next. Just an update, I touched up all the solder points on the main board last night and fired her up. Instead of no image I now have a proper vertical collapse. I'm certain it's not on the XY board as I've tested that board on a working chassis.

Oh! Forgot to mention that, I replaced it with a fresh cap.

Hello! I'm new to the forum and almost as new to arcade board repair. I recently installed a cap kit in a WG K4600 and made the rookie mistake of installing one backwards It didn't explode or anything I just simply have no image now. In troubleshooting I have on occasion got a red/orange line down the middle which I believe is evidence of a vertical collapse and it doesn't last but a few seconds before dissapearing. I have neck glow but no raster.  I'm getting 135VDC at the regulator and 160VDC at the HOT case. I have adjusted the B+ pot down and it went to 127VDC for a few seconds then climbed right back to 135VDC. The capacitor that I installed backwards was C622. I'm looking at the schismatic and it looks like it's a grounding cap but after that I don't know how to make heads or tails of what down the line to be checking. Can someone more knowledgeable than I look at the schematic and let me know what could have potentially damaged on that circuit? I'm going to reflow all the solder points on the board tonight to eliminate a cold solder joint but passed that I'm uncertain which direction to go. Any help is greatly appreciated!

http://www.arcade-museum.com/manuals-monitors/WG%20K4600_Manual.pdf