Hi. I have a Sansui TVM1915 that has a picture that at random.
shrinks down to about 2 or 3 inches tall. Have replaced the vert out
ic la78040, and have tried flexing the board too with no luck. I have
also resoldered many connections around the vert circuit, also with
no change. The pic looks fine and then all of a sudden shrink for a
brief second and then back to normal. Any suggestions highly
appreciated.

Gurckle:
Did you replace any of the half dozen or so electrolytics in the vertical
deflection output circuitry near and around the LA7840 chip? ?
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Best Regards,
Daniel Sofie
Electronics Supply & Repair
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"Gurkle" wrote in message
...
Hi. I have a Sansui TVM1915 that has a picture that at random.
shrinks down to about 2 or 3 inches tall. Have replaced the vert out
ic la78040, and have tried flexing the board too with no luck. I have
also resoldered many connections around the vert circuit, also with
no change. The pic looks fine and then all of a sudden shrink for a
brief second and then back to normal. Any suggestions highly
appreciated.