Question about RCA L42FHD38 42 in. HDTV LCD TV

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L42FHD37 power supply keeps blinking and TV won't turn on.

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Dc out put voltage is defective try to check the out put voltage if dropping try to check the capacitors in the power supply

Posted on Oct 12, 2010

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1 Answer

Tv won't turn on


Replace the power supply board the blinking power indicator is usually indicating the power supply needs replacement or repair. You can get the replacement power supply boards from www.tvcircuitboards.com

Oct 20, 2012 | Samsung LN-S3241D 32 in.LCD HDTV

1 Answer

Power button won't turn tv on. light keeps blinking on and off


Main board to your TV is faulty. Check the chroma and video processing section. In most cases, it will be due to an IC fault.

Jul 23, 2012 | Curtis-Mathis Televison & Video

1 Answer

The infrared receiver light just keeps blinking red and TV won't power on. Tried unplugging for a little while but didn't help.


kindly count the blinking led to diagnose where the fault came from..

also try the initial check....open the back cover and inspect the power supply board for any bulged capacitors inside..

Jan 18, 2012 | Polaroid 4241-TLXB 42 in. LCD Television

1 Answer

RCA L42FHD37 42 in. HDTV LCD TV does not turn on at all


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress from www.shopjimmy.com

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Regards.

Sep 28, 2011 | RCA L42FHD37 42 in. LCD HDTV

1 Answer

I have a Panasonic model TH-42PZ80U Plasma Tv the red light keeps blinking 10 times and it won't turn on?help


hi,
In your tv there some problem with power supply. you have to check the followin voltages. Sub 5v SOS ,Main 3.3v SOS A-Board,DTV 9v SOS , Tuner Power SOS. If any one of the voltage fails it will shows 10 blinks.
ok

Jul 18, 2011 | Panasonic Viera TH-42PX80U Plasma TV

1 Answer

Standby light flashes and TV won't turn on. Have to unplug it and wait for a bit then plug it back in and TV turns on. Quite a delay though. Then after TV is turned off, standby light starts...


seems like a power supply problem inside the tv and when the transformer gets warm it is giving you problems you might have to get a tech seviceman to come out and have a look at it as it is not a job you should do yourself when it comes to replacing the power supply hope all goes well

Jul 06, 2011 | Samsung LN52B530 LCD TV

1 Answer

The red light keeps blinking and tv won't turn the fan won't come on either


Hello,

power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

I hope this will help out in solving the problem....

Jun 19, 2011 | Sony Grand WEGA KF50WE610 50" Rear...

1 Answer

When I turn the tv on it show a blue light but now the tv won't turn on and a red light keeps blinking. What should I do?


Replace the defective electrolytic caps on the power supply and/or replace power supply, check at www.partstore.com That should fix your problem.

May 31, 2011 | Proscan 32LA30Q Television

1 Answer

We have an rca l42fhd37 and its power light keeps blinking


Tv power supply board might have dying capacitors parts like bulging or puffing ups on it tops.That the board where the power a/c cord plug into it.U have all the tools and can do basic soldering and understanding basic electronic?Check the power supply board replaced dying capacitors parts.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Mar 22, 2011 | RCA L42FHD37 42 in. LCD HDTV

1 Answer

Blue power light is on the tv cant turn it off


Unplug the TV wait 10 Seconds and Plug it back in. Should work fine

Sep 26, 2009 | RCA L42FHD37 42 in. LCD HDTV

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