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 | 42LH20R | Lamp protection | Remover o d401 d402 | If the lamps have gone out | |
| LG | CM4340 | Does not turn on completely off inoperative | D926 is d923 sb360 shorted at the power supply | I put 2 fr 306 diode ready and it works again as it came out of the box | Reis eletrônica |
| LG | 49LX300C 43LX300 | Does not turn on, LED is off or flashing, killing the 19v voltage | Leaky mosfet smk630 | Remove the smd and place an irf630, cutting the metal part and soldering it to the board as if it were an smd | Adrian (Chapadão do Céu Goiás) |
| LG | 32LC3R 32LC3R | When turning on a cold TV, the HDMI input has no signal and noise in the sound... little by little the sound becomes ok and the perfect image appears | Apparently defect in the main, but this defect is in the power supply | Substituir c210 680μF x 10v | Tarcisio |
| LG | 32LN5400 | Restart | Nand | I bought another new nand and put it in and it was 100%. Always try to save the board, as this board is getting rare and expensive. | |
| LG | 32LN540B | Screen off with audio | LED bar defect | Tv lg 32ln540b the image disappeared and only the audio remained (leds defect), it was sent for repair and they charged R$400.00, 90 day warranty...a few days after the end of the warranty the defect returned. The owner gave up on the TV and bought another, leaving it with me to study. I disassembled it and saw that only one LED had been replaced and it was the one that failed again. One note...without appropriate welding equipment, the replaced LED may be far from the LED bar, wsound heat dissipation is compromised and for this reason it burns again. Aiming to remove a LED bar and keep the rest of the parts for future repairs, I bought a similar TV for R$ 170.00 (with the screen broken, but showing the image normally) and when dismantling I saw that one bar was missing two LEDs (which had been removed and made a direct connection) as I used one of the bars that was good to repair the other TV, I put the other one missing an LED on it (directly connected), so the one with the broken screen started to work with three less LEDs. Originally this model has 22 LEDs and I could see that now with 19 it is not possible to notice this lack in the image shown, but it would certainly overload the circuit. This TV uses 3 volt LEDs (it would be 66 volts for maximum brightness) the LED power circuit provides, in relation to ground, more or less 130 volts which, after crossing the LEDs, passes through a circuit that regulates this voltage. I didn't achieve anything with a resistor in series, I placed a 33Ω resistor in series with the LEDs to see if it would compensate for the lack of three, but the regulator circuit increased the voltage and the voltage that supplied the LEDs remained the same. So I wrote down the values below which suggest that even if the three LEDs are missing, if the energy saving function is in the minimum saving position, the LEDs will work without any overload (measurements taken with a digital TV channel showing a film and with the image mode : standard). measurements taken on the TV wsound 3 LEDs were missing: energy saving: off 66.7v/minimum 53.2v/average 38.6v/maximum 17.3v measurements taken on the TV with all 22 LEDs: energy saving: off 76.9v/minimum 62.3v/average 46.2.6v/maximum 24.7v conclusion: It is highly recommended that this TV model never has the energy saving function turned off, as in a circuit with 22 3 volt LEDs it is receiving 76.9 volts as seen above, in a short time an LED will burn out and turn off the screen. | littlecarlos |
| LG | 47LM6400 | Turning off after 5 to 10 minutes and then only turning on again if disconnected from the socket | Faulty power supply | Replacing resistor r103 smd (nominal value 8203) open, just replace | MULT INFORMÁTICA E ELETRÔNICA |
| LG | M237WA | Turns off the screen and the sound remains normal | Cold welding t304 inverter power supply | Marcondes Ohm Eletrônica Jaicós PI | |
| LG | 42SL80YD | Only the backlight on, no sound and no image, white screen | Cold solder on the bga ic100 microprocessor on the main board. same thing as the friends above | Reflow processor | Saltech |
| LG | 21FJ6RB | Vertical deflection with 30% opening with trapezoidal effect on the image showing convergence lines. | Shorted deflector coil. | Replace deflector coil. | Leandro Ferreira Braga (Eletrônica Tesla) |
| LG | 29FS4RL CW62A | Turns on the power supply weapon, the voltage comes on, it hits the relay and it disarms | Check resistors r830 and r831 | In my case, the resistor r831 (62k) was replaced and it worked. good luck. only Jesus saves. (electronic service) | Servitel Eletronica |
| LG | 29FX5CL CW62C | Turns on the power supply weapon, the voltage comes on, it hits the relay and it disarms | Check resistors r830, r833 and r831 | In my case it was the r830 resistor (91k) that was replaced and it worked. good luck. only Jesus saves. (electronic service) | Servitel Eletronica |
| LG | K10 K430 TV | It doesn't turn on, it doesn't show any signs of life, but the battery charges | 32 bad oscillated crystal replaces the same. | ||
| LG | RP29CC26 | Vertical closed at the bottom | Tda4863aj replacement | Beto eletrônico | |
| LG | RP29CC26 | Vertical closed at the bottom | Tda5i63aj replacement | Beto eletrônico | |
| LG | 32LG30 42LG30 | Does not turn on, only LED is on | C 1145 | Replace c 1145 47x16 and I also replaced the 3 100x16 c1110, 1118 and 1128 to prevent it from coming back with another defect. The 1145 had a strange appearance so I decided to replace it, but the measurement was perfect. | Josimar |
| LG | 42LS3400 | TV turns on with sound, no image and no backlight | Short SMS capacitor c204 on the driver board left side of the display | I found a replaced LED in the backlight, after assembling the TV it still had sound, no image. I noticed on the tcon board that tsound was no vdd voltage and that the short came from the left side screen driver (right side with the TV mounted), I then found c204 shorted, after the replace the TV started working normally again. It is worth mentioning that they also check c221 and c223 which are in parallel with c204, but in my case it was "c204". | Edumiguez |
| LG | CP-20K42 | No image normal sound increases screen nothing appears | Diodos 501 e 403 em cuto | Replace them and run for the hug | |
| LG | 50PB650B | TV with the HDMI connector ripped out, TV won't come out of standby | Mosfet with code mp1 without numbering on the board, it is close to ic603. It's the only one with this code, short. | Replace mosfet with the same code and check the hdmi connector tracks and resolder it | Ev antunes |
| LG | 42LS4600 | Turns on normally then turns off the backlight, only the audio remains, LED 701 flashes 4 times indicating protection | A burned out LED on the LED bars | Or replace the complete LED bar. or replace the defective LED | Fernando Nascimento |