Question about LG Electronics 47LS4600 47" LED HDTV

1 Answer

Lg led tv has sound but no picture

All of the sudden my LG LED 47LS4600 tv has no picture, just a really dark blue screen. the sound is fine. the tv is only a year old. what could it possibly be? I did notice that the red standby light blinks twice when its trying to turn on.

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  • Master
  • 1,727 Answers

Suspect either a back light power board issue or main power board to back light board issue...also, is it under warranty ?

Posted on Dec 28, 2013

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: LG 1715S faulty

I can confirm the number 3 solution. I have fixed a bunch of these now.
Replace capacitor C202, 680uf 25V. It is usually visibly damaged. It should be a low impedance type, often known as "suitable for switch mode power supply".

Posted on Oct 28, 2008

ginko
  • 19396 Answers

SOURCE: LG 700E monitor's power LED blinking continueously, no display

The monitor is probably on protection.

To start unplug monitor from power and from computer and test computer with different monitor to find out if it is monitor or computer fault.

If it is computer fault and no video signal , then test:

  • Video cable.
  • Video adapter on PC (sometimes integrated on motherboard)
  • Motherboard.

If it is monitor fault , then the monitor is on protection.

When on protection you keep having a flashing led on front of the monitor , and monitor turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the monitor will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occurr are a blown capacitor on power board, faulty inverter board, faulty input board, or a fault on LCD Digital Controller board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Posted on Apr 22, 2009

ginko
  • 19396 Answers

SOURCE: monitor light blinking

The monitor is probably on protection.

To start unplug monitor from power and from computer and test computer with different monitor to find out if it is monitor or computer fault.

If it is computer fault and no video signal , then test:

  • Video cable.
  • Video adapter on PC (sometimes integrated on motherboard)
  • Motherboard.

If it is monitor fault , then the monitor is on protection.

When on protection you keep having a flashing led on front of the monitor , and monitor turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the monitor will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occurr are a blown capacitor on power board, faulty inverter board, faulty input board, or a fault on LCD Digital Controller board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing statebecause of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Posted on Apr 22, 2009

  • 2 Answers

SOURCE: LG Computer Half Light, Half dark?!?!!?

Install the forteManager software that comes with your LG LCD monitor. Go to the Options tab and choose Restore which will set it back to factory settings. For some reason some monitors come this way out of the box and this was the only way I was able to solve the problem with mine.

Posted on Jan 06, 2010

  • 3 Answers

SOURCE: LG Flatron L193ST. Relatively old model. The

L193ST common problem!! solution is only by replacing 2 capacitors 470uf 25v located on the power supply pcb inside the lcd they are neer the long cable connector
remove the 8 screws from the lcd back panel including the holder screws,
use a thin metal stick like a knife and insert it between the back pannel and the front black panel but slowly remove the black panel not to scratch it
remove the metal protection panel 4 screws
the power pcb becomes visible
remove all connected plugs and the 3 screws
desolder the 2 capacitors and replace them
assemble back your lcd and enjoy
30min time of work 5$ cost

Posted on Dec 09, 2010

Testimonial: "Thanks mate! I'll try that once I have some time. "

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