Sony KV-27S42 White Balance Failure

[MarkFromCA]

Hi, First time poster here.

I have a Sony KV-27S42 with a picture issue. The image shows up blue with retrace lines (see picture). It's been an intermittent issue since I've first had it and from what I can see in the service manual it might be a white balance issue.

There are 5 fast blinks on the status light followed by 1 slow blink. According to the manual either G2 needs adjusting, there's a problem with Q306-308 transistors (I'm guessing these are rgb input amplifiers?) or IC301 (jungle chip).

service manual : https://ia601906.us.archive.org/28/i...670/105670.pdf

I tried to rule out physical issues before I concluded that it was any of the solid state components. Not that it's impossible but I figured age/wear and tear of me moving boards about might have stressed something.
I can't find any issues of cracked vias or traces or otherwise anything that would concern me on the chassis (A) board. (see the photo q306-308_and_cn301)

So I looked at the C-board (neck board). I tested the rgb input from the a-board to the c-board to see if there was any issue with a faulty connector. The output from the rgb transistors matched the input voltage on the c-board.

When I checked the connector r,g,b input on the C-Board I noticed that the errored picture would blink back to "video 1" - a proper output screen. So I thought, ok, maybe i have a short somewhere.

Sure enough there were two points where the socket is soldered to the c-board that had cracked joints. However, I realized that it wasn't so much I was making an electrical connection with those points than it was a gentle board flex. I could nudge it with a non-conductive item and achieve the same effect.

It seems to only happen on the side of the board with the CN1752 connection going to the CN301 connector on the chassis board.

So it "seems" like some sort of mechanical failure on the C-Board. However this isn't exactly what the 5-blink error lead me to believe (its jungle chip or the rgb transistors). So I'm thinking it must all be related since the AKB (or IK in sony's case) is relaying some sort of failure from the c-board back to the jungle chip's IK in. I guess.

I'm thinking my next best step is to remove the neck board fully and rework all the joints. At some point along the way those points may have cracked under stress or age.

I'm very much a novice when it comes to tv repair so please pardon my lack of knowledgeable communication! I provided some photos which I hope might give some insight into the areas that I'm troubleshooting.

Thanks!