20 Most Recent LG 42LH40 LCD TV Questions & Answers


Refer to your owners manual for the set. If you are missing it, just search the make and model to locate it. The manual will provide reset information.

LG 42LH40 LCD TV | Answered on May 10, 2015


Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. 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/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time.

LG 42LH40 LCD TV | Answered on Sep 08, 2014


You have a bad micro processor on the main PCB. Remove back cover, board on right side, find part# on board and replace. Shop Jimmy is a good source for TV parts.

LG 42LH40 LCD TV | Answered on Mar 15, 2014


A firm ware upgrade might solve this problem. Upgrading your RAM, if not, the procesor ic on the main board.

LG 42LH40 LCD TV | Answered on Nov 10, 2011


Click here.

LG 42LH40 LCD TV | Answered on Sep 30, 2011

Not finding what you are looking for?
LG 42LH40 LCD TV Logo

53 questions posted

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76001 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18429 Answers

Steve Allison
Steve Allison

Level 3 Expert

5569 Answers

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

Answer questions

Manuals & User Guides

View Most Popular

LG Televison & Video

  • LG Televison & Video

Most Popular Question

screen lg 42lh40 just went blank amp

  • Televison & Video
Loading...