lol Well that too could cause the issue. Did you see if the screen jitters still occur? If not I guess it was the Power Supply that was acting up then.

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The problem is still present but much less.  Which leads me to believe it could be as simple as cracks/band solder connection of the CRT to AB connection.

So still looking into this...

Caps in the psu, caps on the ab
Caps in the replacement psu

C15 is a big problem on these ab's

3.9uf , I replace with 400v

Se's are also known for a transistor going bad on the video board.

Wavy video is always shit psu.

Recap, 15 dollar replacement will need caps aswell. replacement theroy is moot, same situation, Dead output filter caps in your smps. 

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The PSU I believe is good, -I have tried 2, the original one and one that is verified to be working in another SE.

Caps on the AB ...possibly ...checking into that.

C15, yes, that is getting replaced this week ...even if not for good measure.

3.9uf, 400v --thanks!

Recap, 15 dollar replacement will need caps aswell. replacement theroy is moot, same situation, Dead output filter caps in your smps

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not sure I totally follow what your saying here, ...i kind of think i understand but having trouble reading / interpreting this sentence correctly.  Are you saying that if a recap doesn't solve my problem then ...dead output filter caps??

initially here is what I am going to try this week:

1) re-flow the connection of the 4 wires from CRT to AB 

2) replace C15

3) re-check / compare the power of both my power units to verify that indeed the psu is good (even though I was told it was)

...