Question about Sharp LC46SB54U 46 in. LCD TV
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Posted on Jan 02, 2017
SOURCE: Sharp Aqous 52' opc &
Unplug the unit from the outlet, then while unplug, press and hold the power on button for one minute to drain the voltage and refresh the boards...
Try to open again and see if the symptoms remain the same...
If yes, the power supply board produced an out-of-regulation condition and disable the unit. The most common caused of this symptom is the leaky/dried filter electrolytic capacitor in the output of the power supply section. It will drop the voltage from normal and trigger the blinking of the led light. It will not power up unless isolated the faulty parts.
Leaky capacitor sometimes has a bulged/dome at the top but not all. Dried capacitor has no physical indication of fault and looks new and in good condition but actually not. You must have a capacitor checker to determine its condition and pinpoint the faulty one.
If you don't have necessary tools and test instrument and can't troubleshoot the unit yourself, I would advice you to look for a qulified technician to isolate the symptoms..
Also check if your unit is under warranty period, avail it because the manufacturer will fix it for free. Don't attempt to open the back panel because it will void the warranty.
Hope I helped you.
Have a nice day!
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Posted on Apr 25, 2011
SOURCE: power & OPC lights keep
That signal the fact that the power source is in protected mode - a component has failed in the tv and now acts as a short. When the power source tries to start the failed component starts to draw so much power that the voltage drops; this trigger the protection system of the source that shuts it down to save it from frying.
To fix the tv you will need to open the tv and test the voltages on the output rails of the power source to find out which one is triggering the shut down. Then just follow it to the failed part. This requires a good electronics experience.
In your tv the most usual part to fail is the sound board: the radiator on the audio amplifier is undersized so the amplifier overheats and fries. The sound board will have to be replaced - a $250 job at a repair shop.
Posted on Jul 14, 2011
SOURCE: TV won't show picture the
The main tv Tuner signal board have problems or it is dying or might be dead already.But sometimes this tv will still work and can be used,i have the same tv have the same problems it work for me all the times.By doing this process.Everytimes Power and OPC lights blinks.Just push the remote power switch again for tv to repower the tv power and OPC lights again,have go thought this process pushing power remote switch again have to do this like 3 or 4 times sometimes before the tv to work.Tries websites like Shopjimmy.com or Ebay.com to buy a whole new refurbish main tv Tuner signal board for the replacement.
Posted on Jul 30, 2011
It sounds like a bad capacitor. If you are handy, you can search on Youtube on how to replace them on your model. If not, have a proffesional look at it. The individual parts should be inexpensive. The service charge varies. Good luck!
Posted on Aug 30, 2011
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