Question about LG 37LH40 37 in. LCD HDTV

Open Question

LG 37LH40 won't power on

LG 37LH40 will not power on. I have turned the main power switch on, and attempted to turn on by the remote, and the on/off button on the side of the unit. I have also attempted to reset the unit by holding down the power button, while the unit is unplugged.

http://lgknowledgebase.com/kb/index.php?View=entry&EntryID=6281

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Ad
  • 1 Answer

SOURCE: LG TV

There is probably a bad capacitor on the power board, I had the same thing happen to my 42LB1DR after 2 years. T.V. would turn on and white power light would blink, no pictue and no sound. If your'e a diy'er, it is not that hard of a fix. Take all the covers off of the back of the tv(UNPLUGGED!!!), then look at all the capacitors on the power board. lcd_repair_4_bad_capacitors_lg.jpg
These are the capacitors, look to see if any of them appear to have a bump on the top of them. They are supposed to be flat, you can also tell if one of them has gone bad if there is an oily substance on the metal cover that was removed. If one of them is in question, carefully remove the board, and take it to an electronics store to have them sotter ?sp on a new capacitor. It ended up costing me around $40.00 to have this done. Good luck and if you are not comfortable trying this, than take it to a repair shop, but I was quoted around $450 to take the T.V. in. No Thanks

Posted on Nov 21, 2008

Ad
  • 19 Answers

SOURCE: LG LCD flat screen TV - 42LG50-remote control is unresponsive

Sounds like a probable main board issue

Posted on Feb 21, 2009

  • 1 Answer

SOURCE: LG 42PC3D-UE Turning on, clicking, then turning off & repeat

sorry i cant help, but i've got exactly the same problem on my LG, did you ever find a soloution thanks Pete

Posted on Aug 05, 2009

  • 3 Answers

SOURCE: 42" LG 42LC7D LCD TV stuck in demo mode?

Did you have any luck? My LG is stuck in demo mode too. Menu button doesn't work, and keylock was on as default so I can't use the buttons on the TV itself.

Posted on Nov 30, 2009

jan mczeal
  • 632 Answers

SOURCE: LG Plasma 42pc3d turns on, pops, then turns off

The first thing you should look into is the Z-SUS board, the one situated on the right side viewed from the rear. This board develops a high voltage during operation that might be the source of the popping sound. It is also responsible in refreshing the panel for proper picture display. The weird colors on your TV indicates a faulty Z-SUS board.
Note: Unplug the TV and wait for at least five minutes in order to allow the voltages to drain before you disconnect or reconnect any connector.

  • Disconnect the Z-SUS board from the Y-SUS board. The Z-SUS board is situated on the right side viewed from the rear of the TV while the Y-SUS is on the left.
  • Plug the TV back and turn it on.
  • You will still be able to see the weird colors the moment the TV shut off but do not flash. If it does not pop and stays on and there's a sound, you are pretty sure the Z-SUS board is faulty. Replace it.
  • If it still pops and shuts off, disconnect the Y-SUS board from the power supply. The Y-SUS board also develops a high voltage during operation. The power supply is the one right between the Z and Y-SUS boards.
  • Re-apply AC power then turn the TV on.
  • You'll not be able to see any color or video. If it does not pop and stays on with sound, you have a faulty Y-SUS board, replace it.
  • If it still pops and shuts off, please let me know.
Feel free to update me of the result and your own findings.

Posted on Dec 04, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

DVD home cinema DH4430P. How can I make it region-free?


Open tray and remove any disks in tray, then Close the tray.
1. Switch Off Player and Unplug from mains wait 30 seconds (this clears RAM)
2. Reconnect to mains
3. Turn on player with remote.
4. Press ENTER on remote.
5. Press 8, 4, 2, 6, 9. Using keys on remote.if your player is already set to region 26. Press ENTER on remote. (The tray will open and player will power off and close tray.)
7. Switch on power from remote.
8. Player is now Region Free.

Mar 14, 2016 | LG Televison & Video

1 Answer

What circuit board might cause the following problem in my TV?


One of the most likely causes is a bad main board. If this went out during or shortly after a thunder storm the main board was probably damaged. You also could have a bad Y-sus board or a bad X-sus board causing the same symptom but these are not as prone to being damaged by a power surge.

Aug 18, 2015 | LG Televison & Video

1 Answer

Vizio 42 in smart tv won't turn off


The main board needs replacement. Yoiu can get the main board from www.tvrepairworld.com

Jan 01, 2013 | Vizio VW42LF 42 in. LCD HDTV

1 Answer

Tv won't turn on


This can be failure off the main power supply which is a switch mode power supply- SMPS. So please check the link for tips but attempt to open the TV and check only if you are equipped.
click on:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Oct 11, 2011 | Polaroid FLM-3732 Television

1 Answer

I HAVE A TV, LG 37LH40 AND I CAN'T CONECT THE CLOSE CAPTION


The show u are watching must have a CC sign,before u even can get close captioning.The show's have a CC sign,tries press the button on the remote CC 1,2,3,4,5 on one of these numbers will have close captioning for the show.

Jul 12, 2010 | LG 37LH40 37 in. LCD HDTV

Not finding what you are looking for?
LG 37LH40 37 in. LCD HDTV Logo

Related Topics:

318 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

The Knight
The Knight

Level 3 Expert

74185 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18394 Answers

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

Answer questions

Manuals & User Guides

Loading...