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I may be repeating my question, but my zenith tv has developed a loud hum when it is turned OFF - I fear this is a dangerous condition.

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  • weeg590 Sep 15, 2009

    alls well that ends well

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The transformer is bad

I won't go into all the physics of a transformer, but suffice it to say that they contain wire coiled around a solid metal core. Utility power is Alternating Current at 60Hz, meaning that the current flow reverses its direction 60 times each second.

This magnetic field interacts with all of the other parts in the transformer, and since it is reversing its direction 60 times / second, it sets up a 60Hz vibration, which probably causes the sound you're hearing

Anytime you change the state of energy something get wasted. The humming and the heat transformers give off is wasted energy. the louder the hu the more energy and heat the transformer is generating.

If you give me the model number of your Zenith TV, I will see if it is Worth fixing or buying a new one.

The information I need is

  1. Model Number
  2. Is it still under warranty?
If it is not under warranty You might want to read the article below.
But first Important information:

If it is a loud hum, Unplug the TV.
After the loud hum persists, usually smoke follows!!!
If it smoke, you will have have to buy a new TV.

Online Atricle
"The TV just broke and your warranty has expired. What do you do? Should you repair it or replace it? AOL's consumer advisor Regina Lewis offers advice on whether to buy or fix common consumer electronics."

Televisions
Common problems: Display problems are the most common issue as the screen discolors or burns out. The display in a regular LCD flat panel is designed to last 40,000 viewing hours. That's about 20 years for the average TV viewer. But if a problem arises and you're out of your warranty, repairs can cost as much as a new TV.
Cost: Here is where you really want to consider an extended warranty. Retailers offer, for larger electronics like televisions, an extended warranty at usually 15% of the cost of the item. Average TV repair costs are about $500, and when you start repairing the new plasmas that price goes up. When you're paying thousands for a TV to begin with, that warranty might save you money in the long run.
Repair or replace?
TV prices have been dropping almost as fast as PC prices. The overall rule of thumb, as is the case with any product, is to nix any repair that costs more than half the price of a new one. Remember that you can get a cheap TV or a really expensive plasma TV. Whatever the product, you want to make sure your warranty covers the worth of the TV. If it's easily replaceable then replace, but for the big plasma, really get that extra warranty!

My reference.
http://www.msnbc.msn.com/id/13407447/

I hope this helps you, please let me know...

Posted on Sep 13, 2009

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Posted on Jan 02, 2017

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