LG TV Repair: Common Faults and Solutions.
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Results: 4834
Results: 4834
LG Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| LG | 50PK360 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
| LG | 50PJ550 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
| LG | 42PJ550 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
| LG | 50PJ360 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
| LG | 42PJ360 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
| LG | 42PJ350 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
| LG | 50PJ250 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
| LG | 50PJ350 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 | Gbrito |
| LG | 21SA1RL CW81B | The TV takes a while to turn on and when it turns on, black bands appear on the side and a white band at the top of the screen and the + b is at 95v | The cause of the defect is a 4.7 precision resistor in position r844 | After changing it, the TV works perfectly again. | AssisTec - Manari-PE |
| LG | 42PQ30R | Audio disappearing | Change without measuring c202 power supply. lack of 17v on the signal board | Laercio umuaramapr | |
| LG | 28MT49S-PS | No image, LEDs on, with sound. (It may happen that the LEDs are off too). without the 12v that powers the screen. | After checking that the board was not sending 12v to the screen, I measured the short with the multimeter and found some capacitors that work with the LED driver IC. I soon identified the burnt IC. | Replace IC601 (MP3378R). | World TV - Sorocaba |
| LG | 50PB650B EAX65297201(2.1) | TV turns on with audio and no image | Damaged ysus board | Q554E replace and run for the hug | JORGE ASSISTÊNCIA TÉCNICA COTIA SP |
| LG | 42LC4R EAX37617801 | Backlight does not come on, with sound without image | Replace ci u701 | When measuring ci pin 4 and 5 it was shorting | Maike Eletronica Sorriso |
| LG | 42LD | Power changes from red to blue but does not turn on, | Reflow "on a whim" | Rodrigo cofferi | |
| LG | CM9730 | Exits don't work. without power supply +40 and -40 . | 4 | Check c934 27n1000v exhausted ; After the replacement, the power supply to the outputs is restored. | Jocimar Pedro |
| LG | RP20CC25 | Activates the AV, but does not produce an image. | Altered 4.7k r512 resistor | Just replace it with another one with good value | Seën store |
| LG | 42PN4600 | Does not turn on, red LED flashes | Problem with the power supply, change c364, c367, c371, r616, r615 open and diode 304 shorted | Gbrito | |
| LG | 50PQ30R | No image | Main board defect | Do the ext-auto-gen test on the 50g2a_ctrl board | Gbrito |
| LG | 50PQ30R | Turns on part of the screen | Defect at plate and-up | Replace resistors that opened, replacement of transistors that are on the 3 heat sinks, which may vary, which are k3667, rf 2001 resistor r728 of 2.2Ω +-5% of 2 watts | Gbrito |
| LG | 24MT49S | Does not connect wifi | Remove the Wi-Fi card and clean connectors and the bottom of the card with contact cleaner. | Persio(TVCompany) |