Question about LG 62SX4D 62" Television

1 Answer

Will not turn on

2 y/o LG 62SX4D TV will not turn on. When you press the power button the white lights scroll up like normal but it does this for a longer than normal period of time. After about a minute it stops, the top red light comes back on like it does when it's off and the red light right under it flashes like it's a bad bulb. I've confirmed that the bulb never illuminates.

The bulb has been replaced suspecting that the bulb went bad. Still wouldn't work but eventually it did start working and worked for about 2 weeks. Now it's acting like the bulb needs to be replaced again.

When it was working I got into the menu to reset the bulb hour counter and it said there was only 4100 hours on the original bulb. I reset the counter since the bulb was replaced anyway.

It seems like it's unable to get power to the bulb or something is blowing bulbs. I'd like to test if the bulb is getting power but I'm having a hard time bypassing the momentary switch that detects if the bulb replacement panel is installed so I can have a multimeter on the connector for the bulb to check voltage.

I've had no success in finding any technical information so I can troubleshoot. Any advice would be helpful. Thanks.

Posted by on

  • 4 more comments 
  • lilliz67 Mar 21, 2008

    My husband was wiring up a ceiling fan while watching TV and tripped the breaker at least 2 times. Now you can watch our LG 62SX4D TV for about 20 minutes and it turns itself off. If you try to turn it back on, it scrolls through the white power buttons like it is going to come on, but doesn't. This is maddening! This TV is 2 years old.

  • Anonymous May 10, 2008


  • major12 May 27, 2008

    man, i am having the same problem. when i bought my tv it was working fine, i brought it home, and nothing. the white light scrolls up and down like its gonna come on, but then the red light pops back on and the bulb lights starts flashing as if there is a bulb problem. i believe my bulb is burnt out. is the bulb supposed to show continuity on the contacts? i believe it is. i have ordered a new bulb, because i hope that solves it. it sucks to have such a large TV that wont work. if anyone knows anything, let me know. as soon as i get my bulb i will tell you all what is happening. i also paid 12 bucks to download the service manual. if anyone needs it i would be more than happy to send it to them for free.

  • crewchief11 Jul 29, 2008

    I have the same tv, 2 years old. The sound on HDMI 1 stopped working, still had the picture. So I changed to HDMI 2, that worked for a day and then the sound stopped. Next I changed the input to the component cables (I think, 5 RCA wires). That worked for about a day. Next I changed the sound to my stereo and watched to picture still on HDMI. That worked for about 3 or 4 days, now the white lights cycle and then the top light stays solid and the next red light down blinks and nothing else happens on the tv. I am on the 3rd bulb. Every one I talk to says it sounds like a power supply? Any help possibly a service manual or diagram would help. Thank you


  • Terminator X Aug 01, 2008

    When i turn the tv on , white light scrolls up & down, then turns green, after about 2 mins it switches off, lights red & also flashing red light below it, next to that flashing red light is a pic ture of a bulb...

  • Paul_J1 Sep 26, 2008

    Same here, bought a new bulb and nothing changed. Major12 Could you please send me a copy of the service manual before I torch the thing lol



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that gotĀ 5 achievements.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.

  • Contributor
  • 22 Answers

Holy Smokes!! I sure hope you did not try to connect your multimeter to bulb connections . That is from 1500 to 2500 volts and will smoke your meter for sure .
It sounds likes you may have a power supply issue , but , I would put it on the bench and check for bad capacitors with an ESR meter first . Second look for bad or burnt connections along the high volt wire(note the special insulation used and the wide spacing at the termination)
Sadly some bulbs will not run long out of the box due to the occasional manufacturing problems(impurities?) most have a 90 day warranty . See if you can get the bulb into another set or a service depot might try to light it up in their sets .
Handle with care as these bulbs don't like rough stuff and
 DEFINITLY NO FINGERPRINTS or SCRATCHES even on the glass window that may be there in front of bulb proper  .
Also a possible problem may be just a fan not turning as they all
have tachometer wires to feedback the unit . Next make sure no filters are plugged as a over temperature condition may be reached , check the thermal protector for continuity(round metal peice exposed to lamp heat with two wires)
Good air flow is a must as these Ultra High Pressure bulbs generate HEAT .

Good luck
Hugh Ireland

Posted on Jan 08, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Tv wont turn on

old technology, dump it. My work place at the airport just installed a 72" Samsung Ultra High Definition 4K flat television. Easily worth the $6,000 it cost.

Jun 17, 2017 | LG 62SX4D 62" Television

1 Answer

White LED scrolling then click and then the top two LED lights turn red with the first one constantly on and the second one flashing.hey guys we were given a rear projector tv by family friends and they...

You possibly have a lamp issue but most of the cases like that,,

The capacitor is leak or bulged on top..You have to replace it to fix the problem

Nov 08, 2012 | LG 62SX4D 62" Television

1 Answer

Front LED just Cycles white then goes red. Replaced lamp did not fix set. Found 5 volt power on command missing from Digital bd to DMD bd. Need to replace Digital main bd. Part needed is 6871VSMS28B. Will...

Good day!!!

if the command signal from main board to DMD board missing the problem could be the main board..

I already found the board online for only $75 on this site

$100 on this site

Hope it helps..

just add a comment for any follow up questions..

Thank you

Jan 26, 2012 | LG 62SX4D 62" Television

6 Answers

I received an LG 32LX4DC Flat Panel Television from a hotel. It came with a control box LG LST-4100A. I saw on the method to access the installer menu. However, I could not get the hidden menu...

Just an FYI if anyone is having this same problem a factory reset will solve the issue.Follow the above directions... "1. Press MENU repeatedly till it seems to not respond. 2. Enter 2-6-6-3 on the remote then Enter 3. At the top, it says ENTER PASSWORD 0000 4. Enter 9-8-7-6 then Enter 5. Installer Menu comes up scroll through the options until you see "factory reset" change the value from a 0 to a 1 with the arrow keys and then power the TV off. When you turn it back on it should be reset to factory defaults.

Mar 20, 2011 | LG 32LX4DC 32 in. LCD Television

1 Answer

My lg 62sx4d-ub will not turn on. You push the power button, the ballast clicks, then the leds begin scrolling white. Eventually the lamp led flashes red and it shuts back down. I've changed the bulb...

I just had the same problem. Came down to a bad cap on the main power supply board C871. This is the first filter cap after the diode on the 6V supply. Funny,, the schematic calls for a 25V part,, however this one was rated at 16V :-)

Replaced with a new one,,, all is good to go!

Jer in Hayden

Oct 01, 2010 | LG 62SX4D 62" Television

8 Answers

How to remove LG LST-4100A

To remove the LST-4100A commercial control interface from the television you need to follow the commands below.

1. Power on television.
2. Press and hold "MENU" for 10-15 seconds.
3. Quickly press "2-6-6-3" and then press "ENTER"

If you have done everything properly, it will bring up a small menu in the top left hand corner of the television. Kind of a hidden menu.

4. Arrow down to the menu option that says "D Box" and turn the option to "OFF".

Now turn off television and completely disconnect the LST-4100A. In fact, throw it away. In the trash is where it belongs.

Your television will now operate like a normal television purchased from a big box store. You should run an automatic programming setup for grins upon completing.

Enjoy your new NON-commercial lcd television.

Dec 22, 2008 | LG LST-4200A DTV Receiver

3 Answers

MagicSing EG-18000 TV picture

i believed the problem is the TV mode. (NTSC or PAL mode)

try this
turn mic OFF
press and hold 8 then press power buton (PAL to NTSC)
turn mic OFF
press ang hold 9 then press power button (PAL to NTSC)

Sep 05, 2008 | Magic Sing Along Consumer Microphone

1 Answer

LG 62SX4d

please provide the complete model number - look under the model # and you will see rest of it - also on the side

May 25, 2008 | LG 62SX4D 62" Television

Not finding what you are looking for?
LG 62SX4D 62" Television Logo

402 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

The Knight
The Knight

Level 3 Expert

74999 Answers

Are you a LG Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides