Zenith A3720W1

[GoldenCraft]

I have removed the knobs on the side and now I am stuck on removing the plug.

[maxhifi]

Originally Posted by GoldenCraft

I have removed the knobs on the side and now I am stuck on removing the plug.

The plug comes off with the back. It's a deliberate safety feature called a safety interlock - the intention is that you cannot use the TV without the back cover installed, so that you don't get a shock. Pull the back cover off as a whole, and the cord will disconnect itself. Don't try and defeat the interlock and operate the TV without the back cover until you learn what a "hot chassis" is, and how to work on such a set safely.

Nice Zenith btw, I have a very similar one which is the main TV in my house - I've had it for 25 years, it was my first vintage tv, first tv in general, and the reason I signed up for this website. It's capable of a very nice picture when it's working right.

Also don't forget the screws on the bottom of the TV, as well as all those on the back.

[GoldenCraft]

So I have cleaned the dust off the chassis and checked if any tubes were not fully in their places. I tries to test the television and this is the result.

Also, is any want the chassis model, it is 12A10C15.

[zeno]

Looks like a bad CRT or video problem. Be sure you didnt knock
any of the plug in transistors loose when dusting.
Also run it for 3-4 hours & see if it slowly gets better. If so
that points to the CRT.

73 Zeno
LFOD !