K4600 monitor help

[nvanvlymen]

I have a WG 4600 that came out of a pacman I'm restoring. The monitor worked well two summers ago, then started to fail last year when half the monitor started fading away after turning it on.

I just finished doing a recap on the chassis and it did not help... what image does show ... the colours look fabulous now.

This is the only monitor I have and I don't have any spare tubs or daughter cards for the chassis.

Here's a link to see what's going on with the picture.
http://imgur.com/a/3dF5Q7X

As you can see in the photos the monitor has more image showing after it's turned on, then after a couple of minutes the image starts to black out.

I've referenced a couple of documents to troubleshoot but nothing concrete to really go by with the symptoms that I'm getting.
http://www.repairfaq.org/sam/tvfaq.htm#tvvfold

I'm trying to keep this cabinet as original as possible, it still has an original working power supply and I am ordering a set of stencils that I'm going to build a silk screen from to do the artwork with.

Any help would be appreciated, I'm still fairly new at monitor work and I don't have a firm understanding of all the terminology.