partial vertical collapse

[doeby]

i have an ivan off road racing{WG}, sent the board away for repair.  i then took monitor out of cab and the chassis.
I got the board back, as i was putting it back together the neck board was real pain to get back together with monitor.
Now i have half a good screen, and top half of screen has vertical collapse.  i have all the colors and good focus on the working part.

the screened was flipped and backwards, so i flipped the red and the blue, and the screen wasn't backwards anymore
then i flipped the green and yellow, and now have total collapse.

Is it definitely the chassis has a problem?
Could this happen if i messed pins up putting the yoke back on?

I am correct in saying this problem is not the main board since its vertical collapse?
The monitor did work before i sent the board away for repair.

[Zebidee]

You get a horizontal line on the screen?

CRT chassis might be just some cold/dry/cracked solder joins, opened up due to being handled and moved about, and most likely around the vertical IC. Check underside carefully with a magnifier lens, reflow solder if necessary.

Could also be caps (have they ever been checked/replaced?) or the vertical IC itself. Try checking voltages at Vcc, input & output pins.

You can send the monitor chassis (sans tube) away for repair too, so long as they have a compatible tube to test it on.