Question about LG 42LC7D-UB Television

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Tv turns off after 15 minutes of use

The tv turns off after 15 minutes of use. then I unplug the power cord from the wall, wait for 5 minutes and reconect it again. I turned it on, watch it for another 15 minutes and then it suddenly turns off again. I disconect the cable from the wall plug wait for another 5 minutes and reconect again. Then I turn the TV on again, watch it for 15 minutes and suddenly it turns out again. and it goes on and on.

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Re: tv turns off after 15 minutes of use

For bobby11 and luis, it is the power supply. Part Number EAY34797001 in the 42" and EAY34796801 in the 32". This is a known problem, and somebody should start a Class Action against LG over this one. Part is available online and easy to swap out for anyone with the most basic knowledge.

Posted on Oct 08, 2008

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Re: tv turns off after 15 minutes of use

Ok, why are you unplugging it? Does the power button not turn the 42LC7D on after it shuts off (after 15 min)?

Posted on Jan 27, 2008

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My flat screen tv wont turn on but the lite at the bottom just keeps blinking red what does that mean its a sony tv

Unplug the tv from all devices and unplug from the wall power source. After about 15 minutes, plug ONLY the power cord back in and see if it turns on. If not, than you will need to do a factory reset. With the tv pluged into ONLY the wall outlet ( no cable, DVD or internet connection) Hold the UP arrow on the remote than press and release the POWER button on the tv. This will reset everything and the blinking red light should stop. At this point you should be able to turn the TV on and off.
IF for some reason this does not fix your issue, visit HTTP://
Good luck.
Welcome to Product Support Get the help you need

Dec 25, 2014 | Flat Panel Televisions

1 Answer

Magnavox 42MF439B TV stuck in stand by

First thing you can try is:
1. Unplug it from the power cord and wait a few minutes.
2. Turn it on (when it's still unplugged from power)
3. Plug it in power and try to turn it on again

Let me know if this fixes your problem or we need to look for other solutions.

Jan 05, 2014 | SNK Magnavox 42MF438B/27 42 in. LCD TV

1 Answer

Smart T.V Sumsung Got Stuck

It sounds that your TVs' timer function is set to 'ON' for 15 minutes time. Check it, and make it 'Off'. Refer its user manual for details.

Jul 21, 2013 | Samsung UN55ES6500 55 Inch 3D 1080p Smart...

1 Answer


Need to know how many times the led is blinking.

Try this link for more informationmessage_type_solution.png

Re: tv kdl-55ex620 red light blink 8 times Do a Power Reset. 1. While the TV is off, unplug the power cord of the TV from the electrical outlet. 2. Let the TV remain without power for 60 seconds. 3. Plug the power cord back into the electrical outlet. (If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.) 4. Turn on the TV. 5. When the TV powers on and a picture is displayed, reset the TV to factory default settings.
  • If the Reset message does not appear and the TV turns off and on, begin again from step 5.
  • If the standby light begins blinking eight times, return to step 1.
6. After the Reset message appears, allow the TV to reset. Do not press any buttons on the remote control or on the TV and do not make any other adjustments for 1 minute. 7. Unplug the power cord from the electrical outlet. 8. Allow the TV to remain without power for 10 seconds. 9. Plug the power cord back into the electrical outlet. 10. Turn on the TV.
  • The initial setup screen displays if the above procedures were performed correctly.
11. Follow the on-screen instructions to complete the initial set up. 12. Perform a system software (firmware) update.

Sep 04, 2012 | Sony KDL55EX620 55 inch BRAVIA 1080p LED...

1 Answer

My tv will not turn on unless I do the same routine each night. First, I have to remove and insert the power cord from the back of the tv several times until the power button begins to flash without...

The tv power supply board have problems and the cause.That the board,where the power a/c cord plug in to it.Tries websites like, to buy a refurbish power supply board for the replacement.

Mar 14, 2011 | Flat Panel Televisions

1 Answer


Hi Friend,
Check your TV's remote battries. If they are good, then, power off the TV at the main wall socket and unplug the power cord, leave it for 5 minutes. Now, connect back the main power cord, hold the Power On/Standby button on your TV and power then turn ON main switch on the wall. This should resolve your issue.


Dec 19, 2010 | Sony Bravia KDL-40V4100 40 in. LCD HDTV

2 Answers

After a lighting my set didnt work any more. I believe the power supply and the main board are burned, albeit screen seems to be OK. Question where can I buy these two boards? Locally they are not...

Try this:
1. UNPLUG TV power cord from wall outlet (or power strip).
2. Trun ON TV (w/o power cord plugged in)
3. Wait 10 full minutes (not any less)
4. Plug power cord back in
5. Turn ON TV.

If power supply & main board are replaced, it doesn't mean it will work. If it were mine, I would do the above steps a few times (or unplugged overnight) before replacing (not repairing) it.

Get a Samsung!

Hope this helps...

Sep 03, 2009 | LG 32LC2R 32 in. HD-Ready LCD Television

3 Answers

Philips 42FD9954

Hey I have the same problem with my 42fd9954/69s. The best solution that I found that works everytime is I have taken the back off my plasma hung it on the wall. Then when I need to turn it on I it starts clicking, so I get my $10 room heater and blow some hot air down the back of the tv from the top and 30 secs later the tv will turn on.

Too easy. Bit dodgy, but I am a uni student!

Nov 08, 2007 | Philips 42FD9954 42 in. Plasma HDTV

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