Sony TV-700U getting audio but no video

[old_tv_nut]

Originally Posted by matthewray2b

Here's the vid. Should be on channel three. I am now in the process of cleaning the channel selector pot.

https://www.youtube.com/watch?v=8aVixtKT1cQ

EDIT
I cleaned the channel selector and fine tuning pots and it seems to be much smoother but still am not getting it just right yet.

At this point you are wasting de-oxit. If there is something left needing cleaning, it's internal, not reachable from the knobs outside,

It's hard to see in your video because it's overexposed, but it appears you did not find any good fine tuning spot. When the tuning is correct, the diagonal stripes should change to dark diagonal bars (sync and blanking pulses) about 1/10 the width of the screen, and the horizontal and vertical should then lock in solidly.

The picture you are getting is like a bas-relief of the normal signal, showing only the edges of the sync pulses and not nice solid black pulses, and the sync circuits can't lock to that. This normally happens when the fine tuning is way off or the TV and game system are not set to the same channel, but there could be some other cause, I guess.

Can you post a video of how your game system is connected to the TV, in case there is a problem there? Show: where the cable is connected to the game and where the cable is connected to the TV, and any adapter between the cable and the TV.