Broken Zenith

[andy]

I would suspect a bad electrolytic capacitor in the power supply. They tend to operate worse at low temperature when they're failing. The easisest way to find the bad ones is with an ESR meter. If you don't have one, you can at least start by visually inspecting the caps for signs of leaking around the pins. The larger caps will need to be removed to tell if they are leaking.

The other possiblilty is that there is a short that's overloading the power supply and causing it to shut down. Double check that all the connectors are in the right place and check for any solder bridges. It's even possible that a defective replacement tuner could overload the power supply.

This is all general advice, not specific to this model.

[Geoff Bourquin]

I would suspect a cap in the power supply. Without seeing the set I can' t be sure, but my guess is a bad 100uf/25v electrolytic in the power supply. I remember seeing a lot of those with Daewoo printed on them. Sorry I don't remember the location number, and my service data is not with me this evening. I do remember some of them had a blob of RTV rubber against one side of the cap. Maybe that'lll help you figure out which one it is.
Hopefully Andy and I are guessing right.

Also, lets hope the CRT is OK. 18 years old, and Zenith. Thats 2 strikes.

[Jeffhs]

Originally Posted by Geoff Bourquin

I would suspect a cap in the power supply. Without seeing the set I can' t be sure, but my guess is a bad 100uf/25v electrolytic in the power supply. I remember seeing a lot of those with Daewoo printed on them. Sorry I don't remember the location number, and my service data is not with me this evening. I do remember some of them had a blob of RTV rubber against one side of the cap. Maybe that'lll help you figure out which one it is.
Hopefully Andy and I are guessing right.

Also, lets hope the CRT is OK. 18 years old, and Zenith. Thats 2 strikes.

Every once in a while you get lucky, even with Zenith. I have a 1995 Zenith Sentry 2, 19" table model (one of the few '90s-era sets by Zenith that still used the Zenith lightning-bolt logo, as the "Z" in Zenith, on the front panel), that still works as well as the day I got it (as a birthday present for my 39th birthday in 1995). Still has its original CRT. The set was in daily use in my home at that time for four years; when I moved in 1999 I put the set in my bedroom and left it there, using it these days only to cross-check when I have problems with the cable. Other than that, the Zenith has been unused (except for two weeks while my RCA CTC185 was in for service), but I do turn the Zenith set on every now and again to be sure it still works. Last time I tried it it still worked every bit as well as when it was new. The only thing really wrong with it, if you can call this a problem, is that the silver-grayish paint on the cabinet is wearing off in spots. I don't know if this TV will last another seven years (!), but if it's gotten this far it just might make it--one can never tell.