LG TV Repair: Common Faults and Solutions.
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Results: 4833
Results: 4833
LG Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| LG | 21FJ8RL CW-81B | TV in protection. when removing q13, it turns on without sound and with the vertical closed. | When turned on, it disarmed and returned to stand-by. removing q13 turned it on with vertical closed and without sound. resistor r620 overheating and without 5v on the pins of the corresponding components. | Removed the resistor r614, thus opening the image. reinstalled q13 and it no longer tripped. ic601 shorted. | Fernando Afonso |
| LG | 20MT490DF | Shorted to 19v input | Short on the 19v power supply input line. cause c0921 .near the audio output. | Oscar RJ | |
| LG | 42PC5RV | No audio or intermittent audio | Capacitor c318 10uf/25v | ||
| LG | M2631D | LEDs flashing and don't light up, TV works normally | C1110 e c 1111 | HP ELETRONICA | |
| LG | 50PB560B 00000 | Just one image pulse then erases | C 205 smd with leakage below r 201=2.2Ω | Replace without testing * good luck! | Jhone eletronica |
| LG | 32LN536B 32LN540B | Alloy and the image with several colored lines vertically, you can also notice a slight buzzing in the t-con. | Tcon supply voltage is low, around 9.5v. change q409 | electronicssupplyparts - Gramado/RS | |
| LG | 39LB5600 | Standby only, does not blink, does not respond to any command | When arming the power supply on the bench, all voltages appear normally. the processor does not heat up excessively, the main voltages of the main board are present. I suspected corrupted firmware, so I replaced the eeprom and nand memories, which solved the problem. | Replace or rewrite the ic1300 and ic102 memories | World TV - Sorocaba |
| LG | CM4350 | After being connected for a while, the device turns off and does not turn on again (5v power supply drops to around 2.4v) | Check the 6v2 zener diode zd902 and photo coupler pc901 tsound must be 1.6v on pin 4 if it is low, replace both. | Eletronica Oliveira | |
| LG | 49LB5500 LGP474950 | Piscando backlight | Q803 and/or q806 altered, LEDs burned out, screen flashing or no image (with normal sound). | The fets q803 and q806 must be tested outside the circuit, of the pf610bl type, but can be replaced by the irf8010. The only problem is to solder the pins correctly (gd and s) and fix the fets isolated from the housing. | Luisthe |
| LG | CP14B86A | Vertical closed | Changed r316 and r301 | Replace without measuring | Tsat eletronica |
| LG | 42LF20 EAX56856906(0) | I'm sound | L1000 diode replacement | Is close to the power supply connector | DIODO |
| LG | 49UB8550 LJ41V | It doesn't find a wifi network and it doesn't pair the bluetooth remote control. no mac in service mode. | Resolda do microprocessor ic100 - bga cold solder | rafaelmoraes99 | |
| LG | RP-21FE85G | Horizontal output transistor q402 (tt2170) shorted, fusistor fr403 (1.2ohms 1w) open. | Cold solder on the horizontal output transformer t403, causing the horizontal frequency not to reach the horizontal output transistor, burning it. | Re-solder the transformer, install another horizontal output transistor and another fuser. I installed some tt2170, they all burned instantly and opened the fusistor too. probably counterfeit transistors. I replaced the tt2170 with a bu2520dx, it didn't burn anymore. As the bu2520dx is bigger than the tt2170, I had to make a hole in the heatsink to adapt it, but it worked perfectly. | Rgs011 |
| LG | 43UN7300 | Turns on but no image | Shorted screen | Look for the lockout12 point on the right side of the vcon, count 9 tracks from right to left, isolate one track, it will be a little scratchy, but it is usable | HAHNRAHN |
| LG | 50PG60R | Turns on, the image and normal tensions do not appear. | Processor with cold solder.. | Reball | RV ELETRONICA GYN |
| LG | CJ98 | No sound, everything else ok | X600 spacious | Adão Rosa | |
| LG | 14CB25A MC-059A | Vertical closed (I solved it, and the TV stopped after a few minutes), it wouldn't turn on with the stand by LED blinking (I solved it due to a leaky zener diode), low sound/audio (I solved it by changing capacitors). presented three defects in this sequence | Closed vertical: r301 of 15k (was changed to 22k, close to vertical); did not turn on: zd851 (6.2v) connected to the photo coupler pin.; low sound: c504 (near the varicap) and c602 (near the audio aid). | This one took work, but we did it. check and replace the aforementioned components; good luck. | Eletroboy |
| LG | 42LG64FR | White screen, functions don't work | Rewriting of ic 802 atmel 24c64a memory, they sell the data on the internet. | Marcelo | |
| LG | 22MA22D 26MA33D 28LN500B EAX65374603 (1.3) | Monitor does not turn on | Chip responsible for the 1.2v line ic803 (mp2315) visibly burned | Replace the IC, which is an mp2315, or place a linear converter or some other 1.2v voltage regulator on pin 3, which goes to the 1.2v coil. To test if this is the only problem, simply remove the burnt IC and inject 1.2v into the L801 coil, this coil goes directly to the processor, so be careful not to get the voltage wrong. a simple 1.2v 1117 sot-223 regulator will not work as the current is quite high. | Darci Denzer |
| LG | 47LG60FR | Turns on the image and turns off after 4 seconds | The defect was a leak in capacitor c842 next to x1000 | Just remove the c842 | David Jacobina |