Question about RCA Televison & Video
My RCA L42FHD37 was apparently hit by lightning surge which seems to have come through HDMI cable attached to DVR provided by Direct TV. The TV power supply comes through a good surge protector that apparently worked as advertised. No other equipment run through the surge protector had been affected. After the event, the TV was emitting a humming noise and there was a faint green light at the bottom of the set instead of a brighter blue or green light as is the case when the TV is operating normally. The screen was completely blank and there was no sound. Is the TV likely "fried" or could there be a relatively simple fix such as replacing the power supply board?
The power supply is a likely place to find what's causing the problem
Posted on Jul 11, 2013
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Posted on Jan 02, 2017
SOURCE: No audio, no video
Most likely the power supply. In most models, if the lamp goes out you will still get sound. However, the power supply is not a single piece swap. I would suggest getting a voltmeter, and check the voltage where the power cord meets the power supply. Then follow the circuit pathways, checking after each component, until you find a break in power. You are getting power to that light, so some power is getting through. However, the light works on much less voltage than the rest of the television, so probably there is a capacitor or transformer that's gone out.
Posted on Sep 04, 2007
The clicking is the power on relay closing and opening. This happens because the TV has several built in safety systems that will detect and over voltage and over current load situation.The power supply starts up for an instant, senses and overload of either or both kinds and then the safety switches trigger a cutoff. When this happens the power supply will not start up again because another circuit called a latch keeps it disabled. By unplugging the AC cord and trying to start it again releases the latch until the failure triggers it again.
On these TVs the power supply is rarely the cause of the shutdown. Something further down inside the TV has failed. Replacing just the power supply will not fix the problem. The most common reason there would be an overload would be in the high voltage circuit that lights up the 3 CRTs, next would be the coils around the CRTs that bend the beams to make the picture. This is normal circuit aging and wearing out. Unless you are very skilled with trouble shooting TVs I would recommend having a service center look at it. An authorized JVC shop would be your best choice because they will have access to the manuals and bulletins and have probably had other similar JVC units thru their shops.
Posted on May 17, 2008
Hi, thank you for visit fix ya.
Do you havve problems with power supply capacitors.
2200uf 25V, 220uf 25V ( bowed or vented). Located beside power transformer.
Posted on Jul 26, 2009
SOURCE: Power Surge at Home
This time it came in on the cable, the clue was the cable box also blew. So if you had a cable surge supression device...for HDTV, I think you would have survived the second surge.
I do have the technology. It is a F-connector type and will handle HDTV signal.
Posted on Sep 17, 2009
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