Question about Vizio P50HDTV20A 50 in. Plasma HDTV
Tv is hard to turn on. lots of unplugging and plugging until it comes on. When it finally comes on it takes about 15 minutes or so before one of the speaker will work. The biggest problem is that there will be a loud electrical popping noise then the screen will go black, no sound but the green power LED light will stay on. We have to unplug it for about 10-15 secs then plug it back in to get the tv back on and this can go on for several times all day every day. Any suggestion for an easy fix
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Posted on Jan 02, 2017
SOURCE: Vizio 50" Plasma VP50
This may have been the sound of electrolytic capacitors exploding. I would not suggest plugging the set back in until you can have it checked by a qualified TV technician. If you are skilled in Electronics and would like to work on this yourself, you will need:
The schematic diagram, a multimeter, a signal generator, an oscilloscope, and an isolation transformer.
I hope this helps,
Posted on Feb 23, 2008
Your message is pretty old but I'll give you my un-copywrited spiel anyhow;
If it just fails to turn on, the main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself.
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.
Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.
Posted on Oct 25, 2008
This sounds as if it could be a ballast problem, or a switching power supply transformer problem. Both of these can produce this sound. I would suggest that you have a qualified TV technician repair this set due to the dangerous voltages and currents that could be present. In my experience with these TV I would have the technician pay special attention to the power supply board and the backlight/inverter section which includes the ballast used to fire the backlight.
I hope this helps,
Posted on Jun 17, 2009
Above is a training manual, this should help you find and fix the problem if you wish to DIY. If you DO, decide to DIY, you MUST MUST get a Service Manual, for your exact make & model. it will be similar to the Training manual, but explicitly for your set. I do not recommend it however.In my professional opinion, you should contact Vizio and ask for an approved local service center, then, get a "Quote" for repair.
With faults such as this, it is important to leave them disconnected from the wall, as it is entirely possible, for a faulty, TV, to cause a fire, an explosion, or both. Anytime one hears any sort of "pop" similar or not, is grave cause for concern, as usually this means some sort of component failure, in a high voltage area.
Posted on Apr 29, 2010
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