First timer here with a question about my Zenith Avanti (?) Stereo Console TV

[ctc17]

Welcome

The chassis number will be somewhere on the back of the chassis. 25dcxx, something like that.

You really need to troubleshoot the issue. Something is shorted or causing excessive current draw. It could be any one of 100 things and blind replacement of parts will shurly be wasted money.

There are a few owners of those sets here who have great diagnostic skills and can advise you where to start....
davewm and radiotvnut come to mind.

You can still get parts with a little searching.