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.
Suspect either a back light power board issue or main power board to back light board issue...also, is it under warranty ?
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".
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:
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.
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:
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.
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.
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
Testimonial: "Thanks mate! I'll try that once I have some time. "
936 views
Usually answered in minutes!
×