LG TV Repair: Common Faults and Solutions.
Search: LG
Results: 4834
Results: 4834
LG Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| LG | 32LD460 42LD460 47LD460 | Restarting, shutting down alone or the LG logo stuck | Ar 1202 or one of the open resistor banks, close to the memory. (10 r) | Barter it | Alex Lopes <small>This email address is being protected from spambots. You need JavaScript enabled to view it.</small> |
| LG | 21FU1R | Doesn't start | Broken reflector wires and open r308 | Leandro Souza | |
| LG | 14KF3RB MC059D | R844 4k7 aberto | |||
| LG | 14KF3RB MC059D | R844 4k7 aberto | |||
| LG | LM-U1350A | Normal power, low sound | Defect possibly chopper transformer, change in winding, changing current, photocoupler 817 (pc901) does not read due to transformer | Place a 100k resistor on terminals 3 and 4 on the photocoupler (pc910) and the audio returns smoothly | Matheus tony |
| LG | 32LH570B | Backlight turns off after 10 minutes, sound remains normal. | Changed mosfet q602. | Replace | Maurilio |
| LG | 42PJ350 | Drizzled image | R729 2r2 open. to replace. | After changing the r7129, it showed a greenish vertical stripe on the right side, cleaning the t-con flats resolved it. | TECNOBRU SBC |
| LG | 25UM58 | Turning off | Capacitor c214 c215 or c210, keyboard line low | TECVIDEO | |
| LG | 50PM4700 | Turns on, the LG logo appears and then tsound is no image. After about 5 tries the image is ok | Replacement of electrolytic capacitors c210, c214, and c216, both 100uf/50v | Wagner Júnior | |
| LG | 42LG30R | Hdmi, av., component inputs do not work. | Removed from the eeprom-flash (ic 802 or ic 803, I don't remember) and saved the .bin file (memory type 25co) of the relevant model. The detail is that you have to check if all the inputs are working. If not, it's the processor or Corrupted memory. After recording and resoldering, the inputs started working again. | JOSE CARLOS | |
| LG | 47LN5400 | After changing the faulty backlight and solving one of its problems, we found that the equipment kept restarting itself after being turned on for some time. | We found the ic408 on the main pci with leakage, it is a normal npn transistor. Just put some heat on it with a thermal blower and the TV will restart itself, so just change it and it's sorted. | EC | |
| LG | 29FS4RL | Vertical threatening to close | Cause diode. 301 | Replace and go to another | Renildo santa Rita araujo |
| LG | 32LN540B | TV turns on, the LEDs turn on but tsound is no image | Main board | Capacitor c443 leak, reducing the voltage at l1101, which supplies the t with 12v tsound was only 8.2v. | RNSPTEC |
| LG | 32PC5RV PLACA Y-SUS EAX43038301 | Without 15v voltage | Smd capacitor that is from pin 4 of ic 201(bd9763fmv) to gnd in short. this capacitor is on the y-sus board. This board generates 15v through the vs voltage. It uses this voltage and also sends it to the z-sus board. Without it tsound is no image. . | As the capacitor was shorted, I didn't have its value. But the manμFacturer's datasheet recommends a 1 microfarad capacitor. I used a 1 micro/25 volt electrolytic capacitor. smd resistors and capacitors in addition to the tr201 and an smd diode | JOSE CARLOS |
| LG | 29LH300B | TV turns on, appears immediately and then turns off. When the TV is open, tsound is a noise from the LED power oscillator. | This TV uses an LED bar on the side of the screen, a total of 32 LEDs wsound the circuit powers them, divided in half, 16 for each side. | I did several tests on the board and didn't find a defect, and I could tell that it was being forced, I tested by adding another LED to each circuit, so it turned off even faster and the noise increased. So I removed an original LED on each side, leaving 30 LEDs in total, and the circuit started working normally again without the excess noise. | Margutek.BVA |
| LG | 32LF20FR | Receives normal on and off function, power supply voltages ok by connecting directly (I use a 1k resistor on the pwon at 5v, 12v appears then just touch 5v on the pwrdim and 24 appears), another way is to put a strong flashlight on the screen and keep pressing the menu, if you see it could be the same problem. | I replaced 2 mosfets (tsound are 4) of the inverter, in my case short, fdd8447l | Macro Eletrônica | |
| LG | 21FU4RL | Very weak signal | Z102 | X102 | Edval |
| LG | 32LB9RT | Does not turn on, stand by LED is off | TV doesn't turn on or standby, 3.5 v power supply is only 1.5v...disconnect from the main cable, power supply went up to 3.5v, I went to the main to look for a short, I found some 4.7 caps with high ESR, I changed them and nothing, I injected 3.5 v x 500ma and I didn't notice high consumption, the main LEDs lit up, I concluded that the main one wasn't defective, I went back to the power supply and found c510 and c506 (47u x 25v) with high ESR and completely dry, they measured zero with an analog multimeter, I just had to change it (mine conclusion and that the power supply did not supply the main consumption) | Replace | Maurilio |
| LG | 47LA6130 | TV turns off by itself sometimes, sometimes turns off and on but doesn't go out | Change power supply capacitors on the 3.5v line (stand by power supply), | Replace capacitors (without measuring) c201 c202 470μF/25v and 1500μF/10v | Tulio UBA |
| LG | 42LC4R | No signal on hdmi inputs | Capacitors with high esr. | Replace cap. from the comp list: minimum voltage of capacitors 16~25v -- c547-4.7μF c516-10 c117-10 c120-10 c813-100 c824-47 c832-100 c318-10 c316-10 c311-10 | evando viana |