LG TV Repair: Common Faults and Solutions.
Search: LG
Results: 4833
Results: 4833
LG Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| LG | LGLH35FD | Does not turn on or the standby LED lights up, voltages fluctuate a lot | It was identified that the capacitor c202 on the power supply board had a broken track close to the power connectors on the main board | The track was resoldered and the TV voltage returned normally, board repair service. | ELECTRON SYSTEM |
| LG | 28MT49S | TV turns on the screen but tsound is no image, tip from friends sound | Ic 601 defective mp3378e | I replaced it and solved it | Wellingtoneletronicasilva |
| LG | 19LU55-UB 19LH20-UA 22LH20-UA 22LU55-UB 26LH20-UA 32LH20-UA 32LH30-UA 32LH40-UA 37LF11-UA 37LH20 37LH30-UA 37LH55-UA 42LF11-UA 42LH20-UA 42LH30-UA 42LH55-UA 47LF11-UA 47LH30-UA 55LH40-UA EAX56738102/3 EAX55729301/2 | Red LED blinking without image looks like firmware | Verificar e substituir mlcc capacitor eax56738102/3 (c755), eax55729301/2(c848) | Rui | |
| LG | 43UK6520PSA | No image, defective screen | Friends, this 4k model doesn't work with that trick we do of turning off the flat on one side of the screen to find out which side is shorting the screen or shorting the vcon board. The most important thing is that these LG 4k models, when something goes wrong on the screen, the main board goes into protection and even shows a short circuit on the main board in capacitors near the connector that goes to the screen, usually the top connector and then you go crazy thinking that tsound is a short on the board, but in fact the short appears because the board went into protection and even continues to have a short circuit even when the power is disconnected. Another way for this short to appear is to do the test by removing one of the flats that goes to the screen, to try to find out which side is shorted, the main board goes into protection, then you go crazy, that's it, in addition to the screen, I caused a short on the board main. | In short, in my case it was a shorted cover (those 10μF smd ones) on the left side looking at the TV from the back, c1105 and after that I replaced it, the TV turned on and showed an image and I went tsound to measure the short on the main board and the short circuit was gone ...crazy, guys... the short on the main board was above the c9104 capacitor, close to the top connector that comes out and goes to the screen via flat cable... | MIGUELTV |
| LG | 42LB5800 | Lg tv appears soon but does not release image | Problem with the varicap channel tuner model ebl61400103, when observed tsound were some burst SMD capacitors, after removing the varicap from the board it showed the image again. | Probably lightning or electrical discharge passed through the antenna and damaged the component, the solution is to replace the varicap with another. | vitorricelli |
| LG | CM9740 | Some USB keys 1 2 don't work | I changed all the touch keys, still the same problem, I went to the eepron service and some numbers were wrong, I removed data from another sound, the same model (op0-09 /op1-00 /op2-00 /op3-00 /op4- 00 /op5- 69 /op6 -81 /op7-45 /op8-10 /op9-00 ) if you replace the board with another version, change op0-05 and op9- 01 one audio output the other usb radio function key | I did this procedure and saved it in memory and the data resolved function all worked. | Andre |
| LG | 42PN4500 | It doesn't turn on just the LED is on | Ic600 3.3v regulator was only outputting 2.5v | Just replace the regulator and run for the hug | luiz videotek |
| LG | 22MA33N-PS | TV arrived dead. standby off | Capacitor c718 and c716 (change without measuring) after replacement the TV started working 100% again | George Luís | |
| LG | PSPU-J902A 903A EAY6069801 901 | No 5v stby ic301 dead | Replace f301 and f302 (1a), ic301 (str-w6252), r305 (0.39 ω), r927 (22 ω), c307 (100µf/50v), zd801 (15v), d305 (1n4007) | J.S. | |
| LG | PSPU-J902A 903A EAY6069801 901 | No vs go | Replace f801 (4a), q801 and q802 (pn11nk50zfp), d801 and d802 (1n4007), r801 and r803 (51 ω) , ic801 (l6599d) | J.S. | |
| LG | PSC10273F EAY59544701 | No 5v stby ic301 dead | Replace f301 and f302 (1a), d305 (rl307g), ic301 (str-w6251), r305 (0.33 ω) , c307 (22µf/50v), zd801 (15v) | J.S. | |
| LG | PSPU-J808A EAY58349601 | No vs go | Replace f801 (4a), q801 and q802 (pn11nk50zfp), d801 and d802 (1n4007), r801 and r803 (51 ω) , ic801 (l6599d) | J.S. | |
| LG | 42LA6130 | When turning on the TV, the blacklight LEDs flash once quickly and the TV goes into protection | C201 electrolytic capacitor 1500uf 10v on the power supply board | Half capacitance replace c201 and tv worked perfectly | manin |
| LG | CM9740 | Bluetooth doesn't work | Bluetooth bt e2p err, I tried to reset it continued with the same message, I replaced the bluetooth card with another one, solved it worked normally | Defect resolved | Andre |
| LG | 32LN540B | Screen without characters. Turn on, turn on the LEDs but no image | Ci tj1118 next to the flat cable connector that goes to tcon on the main board | George Luís | |
| LG | CM9740 | Turns on starts appears d-protection turns off | This device arrived at my workshop, with a d-protection defect, I tested the mosfets, they were all good, I checked the irs2092s, they were all shorted on pins 10 and 12, I replaced them all with new ones, the output short on the smd capacitor, I turned on the sound, it continued giving d-protection, I checked the voltages +5v - 5v that feeds amplifiers irs2092s and 4580 the +5v giving normal already - 5v is giving 4.3v, this is low when analyzing this voltage came from the power supply pin 5, I removed the sound power supply board to the forehead and connected 2 resistors 1k separately I connected 5.6va pin 10 and 11 amp.p.ctl and pec.p.ctl I connected the power supply to the socket to take measurements all the voltages were normal minus -5v giving -1v ic953 lm79l05f was open c954 100uf 16v bad I changed it I tested it and showed up -5v I put the audio sound power supply on all outputs and they worked. | Defect resolved | Andre |
| LG | 42LG30R | The standby flashes 2x, then just the blue LED and it doesn't turn on | Defect in the inverter, I replaced it, it solved it, you can disconnect the inverter and the sound comes out, just to test | Lucasvisita | |
| LG | 60PB6500 | Red LED flashes and returns to stand by | Lack of food vs and va | Check pin 12 of the ncp1397 oscillator if it has correct power supply (12v) replace this integrated. | mfelipe |
| LG | RP20CC25 | Fully closed vertical | R301 changed | Just replace it with another one with good value | Seën store |
| LG | LM U2350A | Protect | Change the 4 photo couplers of the power supply | Pedrin 0094 |