Question about LG 42PG20 42 in. Plasma HDTV

1 Answer

Hard to power up

Will power after many try's . Power light turns on, then shuts down.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • LG Master
  • 14,553 Answers

This sounds like a very common issue.

If set is hard to turn on (takes several tries)but will eventually turn on here is what my guess would be.

Every set has a standby power supply that is running 7/24 if the set is plugged in and it supplies voltage to the remote circuit that turn on the main power supply for the tv and hence turn the set on.

This is an area where companies cut corners by using lower rated voltage caps. By this I mean Standby usually provides under 10 volts to trigger the set on----what they do is use filter caps rated at say 10 volts max in a circuit with 9 volts (example)=with the standby on all the time the filter caps (electrolytic caps) dry out and fail.

The problem usually begins where you have to turn set on or or two times and gradually gets worse--takes longer and more tries to get it to come up.

Once on it will stay on until turned off for a period of time.

The caps will begin to work better (regain some of the capacitance) as they get hot--hence one it is on it will seem ok.

The beauty of this problem is most of them happen when set is a year or two old (no warranty) and all you have to do is look at the top to locate bad ones.

They are generally black or blue and round and vary in --they have two connections each--a + for positive and a - for negative--not unlike a battery which in a way they are. The + and - are marked on top and bottom of most boards.

They are easy to replace and not expensive parts.

The tops are silver and metal looking with creases on top and if bad they will be puffed up on top---tops must be perfectly flat with no brown material leaking top or bottom.

If this is your problem once you id them (make a drawing) you can begin.

Here is the critical part---on each cap is also marked the value like 220uf 10 vdc---220 micro farad at 10 volts maximum.

If you find for example 6 puffed up and all are 10 vdc replace them with the same value capacitance (like the 220 uf) but go up to at least in this case (from 10 volts) to a 16 or higher rated voltage cap.

The only issue is when you go up in voltage rated value the cap is larger so sometimes there is an issue of physical space for the replacement on the board to fit them in.

The reason they cheapen these sets in this way is if 10 caps and you make 25,000 sets there is a considerable savings in parts cost.

They do not care as long as it lasts past the usual one year parts warranty.

I have taken the time to be long winded because this really sounds like it may be the problem you have.

See attached photo of a typical cap and if you have questions or need advice let me know.

Hard to power up - 11_3_2012_3_04_52_pm.jpg


Posted on Nov 03, 2012

  • danny Dec 10, 2012

    What is the next step if all the capacitors seem ok?

×

Ad

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Laptop wont boot up, black screen, has power


You didn't post the Make, Model of Laptop or the OS you are using. I'll use a Win 7 solution. Boot the Laptop, open the Control Panel, select Power Options, set to High Performance, select Change Plan Settings, set SLEEP to Never, select Change Advanced Power settings, go through the settings , set SLEEP and Hibernate to Never, Power buttons and Lid to shut down. Always shut down and unplug your laptop when not in use to prevent damage from power surges and possible Fire hazard IF the battery malfunctions. A reboot every day will reset the computer.

Apr 21, 2013 | Computers & Internet

1 Answer

My pc is shutting down and I can't wake it up without shutting down the power from power supply. The Antec 300 tower has two blue lights- the top light starts blinking when it has shut down and I


sounds like a power supply problem

Test your PSU power supply unit or replace it if your power supply units fan is not working your PSU is faulty

http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm



One bad lead can cause a computer to continue on a cycle of restarting or to shutdown or fail to detect/ boot up a computer hard drive



Test all leads that attach to your hard drive power and data cables IDE SATA
the leads from your MOTHERBOARD TO YOUR HARD DRIVE make sure they have a secure dust free connections and are not faulty or just replace them they could be faulty

hope this helps

Oct 13, 2012 | Antec Computers & Internet

1 Answer

Not detecting in my pc


hmmm so you have this on USB port. you might want to try this first:

A. shut down computer and ext drive power
B. Turn on computer and let boot up, w/o hard drive power on
C. Make sure ext drive is plugged into usb port
D. Then turn power on ext drive

Windows should 'see ' the drive and add it your my computer

let me know if that helps at all

May 17, 2012 | Transcend StoreJet 320 GB USB 20 Hard...

1 Answer

Cant install my GoFlex external hard drive.


try shutting down computer and ext drive

turn off power to ext drive

restart computer and let it stabilize

connect ext drive usb
then turn on power to drive

windows should 'see' it if usb cable and power supply cable are known good.

May 15, 2012 | Seagate FreeAgent Go 500 GB USB Hard Drive

1 Answer

Well i was driving one day and my subs just whent out so i bought brand new wires and hooked everything up but the power protector light turns red whenever uu turn it up past volume 10 i really do not know...


It sounds like your amp is going into protection. I know it's frustrating, but this is actually a good thing. If you subs you have are drawing too much power and the amp can't keep up, it will shut off instead of melting the board. Usually, the protection mode only last a few seconds. The user normally turns the music down that the protection shuts off and the music plays again. I recommend looking at a larger amp for your subs, if you are going to play them that hard.

Aug 14, 2011 | Car Audio & Video

1 Answer

Kicker zx1000.1 stopped working completely. I have 3 Kicker 10" cv subs hooked to it. The first time it shut off I turned the system off. When I turned it back on it worked for a few minutes and...


First check to see if your'e getting power to the amp by using a test light and touch the main power(12V battery) connector on the amp, test light should come on since it's constant 12v supply. Now turn on the radio and test the remote wire connector on the amp and you should have 12V(test light should come on). Also make sure that you have a good connection with your ground wire, check both connection points to make sure it's good. Now if you have power where your'e suppose to and when your'e suppose to and the amp does not power up, then it may be time for a new amp. Try wiggling the connections at the amp a bit, the solder may be cold/loose.

Jul 12, 2011 | Kicker Car Audio & Video

1 Answer

My dell inspiron 1545 won't shut down went i click on the shut down icon it won't turn off .


Hold down the power button for 10 seconds. That will hard-shut the PC. Once that is done, fire it back up, and try again. Somethimes, windows will act goofy shutting down. Especially Vista when it is left on too long without shutting it down.

Jun 20, 2011 | Dell Inspiron 1545 Notebook

1 Answer

I have a Gateway Solo Pro 9300 laptop. Whenever I shut it down, the power light turns orange, and the backlight is still lit. Other than that, the hard drive and fans turn off. What does this mean. How can...


That means the computer is in 'Sleep' mode. To completely shut down the laptop, you can press the power button once and it will do a normal shut down.
Good luck!

May 08, 2011 | Computers & Internet

1 Answer

Power button failure


  • Power Light Shuts Off
    If the power shuts off during game play (even as much as 30 minutes after the system is turned on), then turns off and won't turn back on or the fan isn't working, the system needs repair.
  • Power Light Flashes
    If the power light flashes once when power button is pressed, then turns off and won't turn back on, the system needs repair
  • Sep 11, 2008 | Nintendo GameCube Console

    Not finding what you are looking for?
    LG 42PG20 42 in. Plasma HDTV Logo

    272 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

    74383 Answers

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

    Answer questions

    Manuals & User Guides

    Loading...