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 | CM8340 | Cuts audio when volume increases | C920 or r919. measure voltage on the c920 value =100mv, if it is lower the problem is on the c920. check r919 out of circuit 1mega | Chicoalagoinhas | |
| LG | 32LB550B LT43B | With sound and no image, but backlight on | Transistor q 405 on the main PCI burned out, I replaced it and the TV kept restarting then I found capacitor c135 on the screen board short, I replaced it and it worked perfect | Q405 main board and C135 screen board. | MARCELOTJ |
| LG | 29FS4RL | Relay doesn't turn on | C405 shorted | Colocar capacitor 1k 2kv | ma eletrônica |
| LG | CM4350 | Without sound and then protection activates | Ic 931 78r12 dando 8v | Replace ci 78r12 | JRN |
| LG | 42LH35FD | LED blinking with no image or sound. 5v voltage was oscillating between 0v and 2v. | C871 shorted on main board | Swap c871 | Paulo Russo |
| LG | 32LE5300 | Turns off the backlight by itself after a few minutes on | Reformulating the previous tip; Looking a little more, I found the cause of the defect. It is the zd7 diode (it is a double diode) on the inverter board that is defective, it regulates the 3v3 voltage of the driver on and dimmer pins. put 2 3v9 zenner diodes in its place. | EC | |
| LG | 32LE5300 | Turns off the backlight by itself after a few minutes on | Reformulating the previous tip; Looking a little more, I found the cause of the defect. It is the zd7 diode on the inverter board that is defective. put 2 3v9 zenner diodes in its place. | EC | |
| LG | CM5660 EAX66901201 | Does not turn on standby well, power supply defect | Photo coupler pc901 c902 pc903 and te431 ic951 | ELETRÔNICA MUNIZ BAHIA | |
| LG | 32LE5300 | Turns off the backlight by itself after a few minutes on | If the backlight LEDs are working perfectly, check if the voltage entering the inverter board at the drvr-on pin drops from 3v3 to +/-2v when the backlight deactivates. | If the driver-on pin voltage remains at 2v2, short the side pin (PDIM 3v3) to the driver-on, thus forcing the backlight to remain activated, it is likely that the defect is caused by the main board, some component on the Defective driver on line. | EC |
| LG | 42PN4600 | TV doesn't turn on | Short on the y-sus board (brown board with black heatsink) | In my case the short was in the IGBT transistor rjp63k2 (q703, on the underside of the board). To find out if the short is on the y-sus board, simply remove the power cable from that board. If the TV turns on without video, then the problem is with it. | Darci Denzer |
| LG | 14FK3RB | Horizontal black stripes at the top of the screen (these are wobbling) you would also notice a thicker white stripe | 220/35v electrolytic capacitor c309 | Replace without measuring | Norte Eletrônica |
| LG | RP-21FE85G | Works with the normal screen by injecting signal into the inputs, antenna or AV, closes vertically and turns off. | Memory c2404 | Replace, in my case tsound was no audio, adjust through service mode, | MaTões Ass. Teécnica |
| LG | 32LF20FR | No standby, green LED on main access, all power supply voltages ok. | The 3.3v standby voltage was missing | Regulator ic1007 was dropping 2.1v. Replaced and worked normally. | Eletrônica JJ |
| LG | CP-20J50BRS | Turns on turning off entering protection | Ic 301 vertical ta840k c829 100mf 160v aberto ic801 foto acoplado | After changing the components, the TV returned to normal | Cicinho |
| LG | 32LV2500 | LED off does not turn on | Capacitors 453+456 on the main board near l2 | Remove the caps. go for the hug | rn eletronica fortaleza ce |
| LG | 42PQ30R | No image with sound | Main board | Do the auto gen, if it shows an image just replace the main board | Cabeça |
| LG | 29CC2RL | It does not turn on or light up on stand-by, when turned on it only activates the primary power supply and remains off. | R-830, 831 and 833, one of them with impedance changed to higher. | SANTANA | |
| LG | 50PB560B | Connects with audio, without image. | C205 shorted and charred. it is under the glue of the transformer on the y-sus plate | C205 replace | Marcelo Piranga |
| LG | 42LG80FD | LED flashes blue and red | Voltage varying | Boot q203 | FRANCISCO FERREIRA |
| LG | CM-4320 G-10 F-5 | Turns on without sound, everything works, but turns off after + or - 3 minutes. | Diodo zener zd-904 de 10v | Measuring on the plate, low scale, it measures good, but outside the plate, on the high scale, it measures short. | Pedrinho |