LG 42PC1DA 42 in. Plasma HDTV Logo

Question about LG 42PC1DA 42 in. Plasma HDTV

1 Answer

LG42PC1D failure to switch on

Ive owned the LG plasma for several months now and I am having a problem with the set failing to respond to being turned off and on.Also the tv is failing to repond to any switch's leaving me with a the set turned on but no picture no sound and wont do anything. However unplugging and reinplugging seems to cure it, its becoming quite a regular problem!!! Engineer has been called out (COMET) but did nothing as it did not happen whilst he was here infact he never even took back of the set off.

Posted by john routledge on

  • Richard Darsa Nov 10, 2007

    I am on my second tv now - curries replaced it once, but the problem has started to reoccur - time for my 3rd one I suppose.



1 Answer


  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Contributor
  • 47 Answers

Usually this problem is caused by poor solder connections on the main power supply board. The unit being a plasma tv has many supply voltages and sometimes has multiple power supply boards. By removing these boards and resoldering any suspect connections, the problem is usually resolved. Many companies will do anything to avoid repairing a unit that is working, even intermittantly. Call the responsible parties and demand that they service your unit properly, not brush you off. Scrivitron

Posted on Jun 16, 2007


Add Your Answer


Uploading: 0%


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



Related Questions:


MY LG 60PZ576-T8 plasma has no pic./?

It could be up to 6 boards causing the issue, plasma sets are harder to work on as they have more boards and the boards are somewhat inter connected, I would take it in to have it serviced or better yet buy a new set

Tcp60st30 will not turn on

It is possible the power supply failed. Did you try a reset by unplugging the set from the AC for about ten seconds and re-plugging it back?

If the power supply failed, there can be another circuit board that has a fault that caused the failure, or the power supply can simply be in protect mode, because of a failure on another board.

The service rep would test by first replacing the power supply, and work from there...

Jerry G.

Plasma tv is turned off at powerpoint when not used. doing that for a few month now. now when I turn power on and then tv it clicks on off on off etc when i switch off on several times with sometimes 10...

Dont know about this model but alot of tvs have little solenoids that go bad that triggers the power on your set,if you know some one have them replace it with an optic coupleror replace the solenoid yourself ,not that hard really

The screen on my lg 50" plasma went white and

The power supply has obviously failed. An Authorized LG agent will advise on repair cost. If it is just the Power Supply it may be not too bad but un authorized technicians do tend to hike the prices up to cover the lack of experience.
Write a nice letter to LG, they may well listen. It's worth a try depending on where your location is. Lean on the age of the set and that you are very dissapointed that such a good named product should have failed so soon.
Good luck.

My 2 year old 60in LG plasma turns on and then turns off right away automatically.

I had a similar problem with my 42 in Philips LCD HDTV.

Here was the problem. My Power Supply Board had several bad capacitors. I opened my TV (warranty was expired of course) and found four bulged capacitors. Many electronics companies were sold capacitors that failed in 2-5 years instead of 10-20. The capacitors fail prematurely due to a lack of preservatives. Unfortunately, they were installed in all sorts of devices and cause a wide range of failure problems.

Here are some options for you.

1. Have it fixed by a professional

2. Open your TV and find PSB. Check for faulty caps. If you find some (bulged or leaking) bad caps replace the entire board.

3. Remove and then replace individual faulty caps. This takes some soldering skill.

Caps are inexpensive and if you can take care of it yourself it will save you hundreds.

I have a tip/tutorial on this site that may also help. It gives step by step instructions for replacing caps on PSB #715t2432-2. If this is your board you are in luck. It's called: Fixing the Philips Turns/shuts off on its own problem.

Hope this helps and Good luck.



Theres a really loud bussing noise coming from the back of the tv ive only had it a month

A small amount of buzing is normal for a plazma set, but should not be loud enough to interfere with watching the set. Givin that this set is 1 month old, return it for warranty exchange.


42PG20 42 in. HDTV Plasma TV: i have an lg plasma tv - 42pg20 when i turn o...

There are several known issues that can cause that.

The top candidate is the main board, the next is the Y-Main board.

Here's a link for repairing the power supply board of LG 42PG20, which also contains a link to how to test your own board to see if it is good or not:


Hope this helps!

Hi. i have an LG 42inch plasma, approx 18 months old. about 2 months ago, a green stripe developed down the right hand side of the screen, approx 1.5 inches wide. last week a 2nd stripe the same width...

Sadly, the plasma screen is failing. The green strip is no longer functioning properly and the failures will continue to progress.

If still under warranty, get it exchanged.

Video issues

Posted same response on the other Zenith issue...

I've owned this unit since Dec 2005. It appears there are two Video Amp boards Z & Y-SUS boards, that have failure problems.

After 10 months, my ZSUS board went out and was replaced under warranty. And... Just a month ago, the same problem occured again, so I've complained to Zenith (LG) and they are extending my warranty to repair the unit.
Not finding what you are looking for?


Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76849 Answers


Level 3 Expert

85240 Answers

Muzahura Frank

Level 3 Expert

2071 Answers

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

Answer questions

Manuals & User Guides