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How to trouble shoot a lcd tv

GREEN POWER LIGHT COMES FOR 1 MINUTE THEN GOES BACK TO STANDBY

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TV goes to blank screen standby after one second of normal functioning green power light on. When in standby state, the TV is blank like it's off and the red standby light blinks FOUR times.


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/

Oct 16, 2015 | Sony Bravia KDL-46V4100 46 in. LCD HDTV

2 Answers

My 15 month Celcus LCD423D913FHD tv will not turn on. The standby light is lit and will flicker but will not power up the tv. What is the likely problem?


Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Oct 20, 2014 | Televison & Video

1 Answer

Emerson lc320emx trouble turning on


You probably have an internal power supply problem

Mar 04, 2013 | Emerson LC320EM9 32 in. LCD HDTV

1 Answer

My green light does not come on


I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have to buyand try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.If set is opened at least look for puffed up and bad caps like in thisphoto.5_15_2012_1_33_36_pm.jpg

May 15, 2012 | Westinghouse W33001 30 in. HD-Ready LCD...

2 Answers

Power Issue


Now,u plug in the tv u get a solid red standby power red LED light in the front of the LCD panel right?When u push the power button on the remote u hear a clicking sound?Only one clicking sound,not the power supply board problems.It the Tuner board problems.But u can make sure it the power board problems or not.By taking the tv aparts check the power board,that board where the a/c power cord goes into it.Look all around the power supply board check for these leakage capacitors,they alway bulges up it top or puff up it top.No bad leakage capacitors,then it not the power supply board problems.

May 14, 2010 | Haier HLH406BB 40 in. LCD HDTV

2 Answers

Screen and sound problem?


sony 2005 kdf e60a20 tv---turns on and off every 2-3mins...green power lite stays on no blinking

Mar 27, 2010 | Sony KDF-E60A20 60 in. LCD HDTV

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Hi. My sony KDF-E50A10 will turn on for about 30 seconds, then the picture and sound go off, the standby/power light flashes 49 times green and the set turns back on. After 30 seconds, the same thing...


tv works for about 2 minutes, then shuts itself off. the red standby light flashes 50 times, then the tv. comes back on for approximetly 2 minutes then goes off again, only to repeat again

Sep 28, 2009 | Sony KDF-E50A10 TV

1 Answer

Stuck in standby


Sorry about that. When the tv goes bad like not turning on, the green light will blink, and goes right back to red standby light while the dtv letters will briefly show on the lower right of the tv screen, then go back to blank screen. The tv will need to be taken to an authorized service center for repair. Common causes are a bad inverter/power supply, power control board, or circuit board.

May 16, 2009 | Emerson LC320EM9 32 in. LCD HDTV

3 Answers

TV won't turn on even though it starts green, then goes off


Although my tv still does the "turn green and turn off" thing, I simply unplugged and repluggd the tv. After I did that, I pushed the "ON" button on the tv itself, unplugging and replugging the tv until it finally came on. I think the "instant warm-up" switch is going out.

Feb 18, 2009 | iLO 3200 32 in. LCD Television

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