Question about Zenith Televison & Video

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Zenith 32" Model # 221-42180581

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  • jtmcdiv Nov 17, 2010

    Thanks. As suggested I am calling the repair shop this morning.

    The reply from Silverdragon was prompt and easy to understand.

    All the best, Jack

  • jtmcdiv Nov 17, 2010

    Thanks, your response is very helpful.



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  • Zenith Master
  • 12,061 Answers

That "rapid thumping sound coming from inside" (sic) Well, this is a classic "Hic-upping" switchmode power supply problem. The protection circuitry inside the SMPSU, has sensed a severe potential problem, and is attempting the shutting of the set, down to avoid a fire, explosion, or both.
This set had developed a problem, that is so severe that the set must be shut down, (This set should be removed from the Power),
What is happening is the internal "Fault" that is causing the Protection Circuitry , to detect the problem and attempt to shut down the set, keeps restarting the set, because as soon as it shuts down, the "Faulty" component(s) cool down?, and the "Fault" ostensibly "Clears" so the PSU starts up again, only for the component(s) to heat up, whatever, again and fail, so it shuts down, and if left unattended, this would continue on until the part eventually failed. As related this is called a "Hic-upping Power Supply". Any fault that involves the power supply is usually quite serious, and needs a professional, usually, unless one is familiar with servicing current day, televisions. These problems can just spontaneously occur, usually it is to do with simply being connected to the power lines.. the sets are always subject to spikes surges, most often with no damage but sometimes there is, as i suspect in your case.
It is my professional recommendation, you should get a "Quote" for repair, from, an, Approved Service Center. Zenith in your case. Now, this point is very important for a good result, Always contact, their "Local" or a, "Head Office" Philips in your case. Ask them, for a referral to an authorised servicing center, where you ask for a "Quote". Now, when you get the information you want, then you can decide as to repair of replacement.
The reason we want an approved agent, is that way, all the engineers are trained on their own brand sets, they have seen almost all faults, and will get the job done quicker, and for less cost, and usually have parts on hand, also sometimes, there has been a service bulletin in issued and the repair may be subsided or even free. There are many, many, many reasons that display this symptom, one must work through the troubleshooting steps to isolate and identify, the Cause and repair that and any damage done.

Posted on Nov 15, 2010


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