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 | CM4450 | I'm sound | The 35v power supply for the audio output is missing | Q901 (fet 8n80) in the power supply primary, and the photocoupler pc903 that monitors this voltage. | Baguatech |
| LG | 50PB650B | TV without image. Symptom y-sus board, z-sus and signal board inoperative | TV with the y-sus and z-sus cards inoperative. the signal board or tcom is supplied with 3v3 on the ic 453, but it is inoperative “the d401 led does not blink” defect found on the y-sus board: c205 smd under the r201de 2r2 near the yellow chopper transformer “it is under the glue silicon” it has a short circuit, causing the dc/dc power supply to not generate +22v. which powers the 205 smd as7818 ic which regulates the +18 volts. the voltage at the IC was around 7v. the value of the capacitor is 1k5pf /1kv. | Place a normal blue 1k5pf /1kv capacitor in position c205. | aldin |
| LG | 47SL90QD EAY58470001 | Dead power supply | Check and replace d201 and d202 | Rui | |
| LG | 50PK550 | Does not light blacklite | Capacitor plate on the left 150mf/35v has little capacitance and is a little bloated | I put 200mf/50v it was perfect | Alextecnico |
| LG | CJ87 | Beeping from speakers when calling | X600 with oxidation | Replace the x600 for another 24.576mhz, the same or if it is not SMD, solder terminals 1 and 3. | EduSSantoz |
| LG | 42LK450 | No image appears | Capacitor c402 next to the inverter transformers with leakage value 54j | reginaldo moronte,eletronica junior caldas novas | |
| LG | 42LY340 | Flashing backlight | Bad power supply | I replaced the power supply board | Adrian Chapadão do Céu Goiás |
| LG | 42LH20R | Does not light up the screen; only sound | Check power supply resistors 610, 611, 612 and 613 (all 680k), if any of them are altered, the ccfl lamps on the panel light up and after a few seconds go out. | wander | |
| LG | 32LV5500 | Normal image, hissing sound | Defective x101 (close to the processor) | X101 crystal replacement | FILIPE FURTADO |
| LG | 32LN5400 | Does not turn on or does not turn on | Cold solder on the power supply board | Solve all the plate | Tulio UBA |
| LG | 42LV3700 LB12B, LJ12B, LT12B | TV doesn't show video, but turns on, inverting doesn't work | C402 shorted but check the other capacitors on the same power line. | FLIPFLOP | |
| LG | 26LH2000 | Does not turn on and has no stand-by | Check replace r501(2r2), ic500(ice3b0365j), zd501(3v6), zd502 (24v) | MStronica | |
| LG | 14CB20 | After about half an hour or so the tv turns off on its own. | Diode d501 (1ss133) with problem ( | Replace the diode. If you don't have a 1ss133, you can use a 1n4148. | Tiago C. Neves |
| LG | FA 162 | League without sound | Str x 6757 or 6759 | ecb alves | |
| LG | CM4330 CM4330 | Went into protection when increasing the volume | Aclopador pc902 | Resolved a hug | dinetronic |
| LG | 39LN5400 | Flashing standby and won't turn on | Resolder the entire power supply board | And I'm happy | renildo |
| LG | 42PW350 | Turns on and off and returns to stand by | 2 capacitors of 3300 mf/10v on the 5 volt line practically exhausted. the impression was that tsound was a defect on the y sus board. when it was isolated from the z sus board the TV turned on normally. paca y sus tsound was no short. what was left was the power supply board. the relay tripped because the 5 volt power supply was not supported. | Changing the 3300 mf/10v capacitors and checking the power supply capacitors. tsound were several with low capacitance and high esr. after that the tv started working normally again | jose carlos |
| LG | 42LD460 | Turns on, hangs on the logo and gets the screen all "scrambled". | Check the "air" resistor banks that are close to the bga....all 10r resistors...good luck.. | <small>This email address is being protected from spambots. You need JavaScript enabled to view it.</small> | |
| LG | 50PQ30R | It doesn't work, plugs it in, you hear the relay arming and tsound's no image. | After checking the ysus board, I found transistors q22, q23 shorted and fuse fs 202 open. | Replace damaged components, general board check. | arock |
| LG | 32LN LGP32-13PL1 FONTE LGP32-13PL1 | Burning q101. | After replacing all burned components due to c102 being shorted, the new MOSFET burned again. check r106 (1.2k), if it is open the mosfet shorts out as soon as the power supply is energized. | electronics supply parts - Gramado/RS |