Need help with K4600 Chassis

mcogswell1984

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Hello! I'm fairly 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. I first replaced the cap with a fresh one and 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 K4600_Manual.pdf
 
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Update:

So I reflowed all solder points in the main pcb and tested it. Instead of no image I now have a proper vertical collapse. I call that progress :p now to track down the bad component(s) along the vertical output circuit and I hopefully should be in business.
 
i would check tr301-tr307 and c300's and c600's and cold solder joints on main chassis.
 
Thanks for the suggestions! I should have added that the issue is NOT on the XY board. I've verified it's working proper by installing it in a working monitor. I have reflowed every solder point on the chassis so I'm fairly certain I've eliminated cold solder joints too.
 
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