WG monitor super fuzzy and green :(

[samv]

WELLS-GARDNER ELECTRONICS CORP
MODEL NO: 25K7191
CHASSIS SERIAL NO: WG629967
CHASSIS SERIAL NO (2): 12591
BOARD STAMP: P538
120V 60Hz 100W MAX
MANUFACTURE DATE: JANUARY 1991

Hello everybody. My wife got me a Marvel Super Heroes Vs. Street Fighter arcade cabinet about a year ago. It worked great until the other day. While I was playing, the picture went from perfect to what you can see in the attached pictures. I've never troubleshot a CRT and I don't even know where to begin. Is this a common problem? Will somebody please help me troubleshoot this?

[Ken Layton]

Flyback is probably going out.

[samv]

Thank you ken, I just ordered a new one and I will try to change it out when I get it.

NOTE TO ANYONE ELSE READING THIS:
Removing the flyback can be dangerous, do some research before you try it.

[Sarver Systems]

I'd also check the solder joints on the 3 transistors on the neckboard.

I know on my WG monitor, 2 of 3 have broken traces and need stitch soldering to repair.

My screen is also "All green", but when I wiggle the transistors, the other colors come in just fine.

[samv]

Noted, thanks for the response, I'll take it apart this weekend and check the connection on those transistors.

[Sarver Systems]

They have little heatsinks on them, which add some weight to them. If the heatsinks were soldered to the board as well, it would be a much better design!