LG TV Repair: Common Faults and Solutions.
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Results: 4835
Results: 4835
LG Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| LG | 1470 | No image, very low flyback supply voltage b+ | It was found that the flyback had a short in its primary and the capacitor c721 and the resistor r726 were damaged by the internal short of the flyback in the abl circuit. The flyback and capacitor were replaced, and everything started working normally again. | ||
| LG | 1470 | After changing fb, spots on the screen and unstable frame size | The image is irregular, darker than usual and the brightness/contrast buttons don't work (they don't work linearly. as I increase it it can increase/decrease the brightness/contrast). - the right part of the image has spots. - when I change the resolution or modify the image (for example, I am on a dark screen and open a completely white screen), the intensity of the image changes and the size of the frame too. I opened the monitor, the technician installed a Copeco 14023 flyback (correct for this monitor), but apparently he did not replace any other parts. Reverse the 2 wires on the outer coil of the fly-back. (the one wound on the ferrite) | ||
| LG | 1470 | Does not control brightness | Well, the thing that kept me up at night is the c 919 470/16 volt electrolytic capacitor, in the power supply, after I checked all the components on the brightness line several times and found nothing abnormal. | ||
| LG | 1470 | The flyback and components in the abl line were replaced but after turning on the monitor it does not display contrast and when turned off there is a bright spot on the screen | This monitor, when the fly burns out, has the habit of burning components in the abl line and sometimes it even makes a hole in the board and chars the tracks because that's where the problem was between the abl track and the ground, it was charred but I I had no idea that it was leading from abl to ground + or - 1 k, so I dismantled the track and made a wired connection and the monitor is working perfectly. | ||
| LG | 1470 | When it received the video signal, it disarmed and had an amber LED. | Q905 shorted. I replaced the transistor q905, and the defect disappeared. | ||
| LG | 1470 | Doesn't turn on, doesn't have a mat | Sparking in the tube. change flyback code 61742-2001 to ipeco code 14023. | ||
| LG | 1465 DLS | Turns on, there is voltage at the power supply but the filament does not light up | For the filament to light up it depends on a high level on pin 17 of ic202 and this commands q918 which commands q920 which commands q919. Finding the defect in the flay black, I replaced it and the monitor worked | ||
| LG | CB775C-NA | It kept blinking when adjusting vertical position | Change the tda4866j (ic601), of vertical deflection | ||
| LG | 1470 | Inoperative. green LED lights up | Flyback | ||
| LG | 1470 | Inoperative. green LED lights up | Flyback | ||
| LG | 1470 | Inoperative. green LED lights up | Flyback | ||
| LG | 1470 | Inoperative. green LED lights up | Flyback | ||
| LG | CP-20B84 | Dead | Ci ta8808bn. | ||
| LG | CP-20B84 | Dead | Ci ta8808bn. | ||
| LG | CP-20B84 | Dead | Ci ta8808bn. | ||
| LG | 29FX5R | Frequent burning of the horizontal transistor | X401 | ||
| LG | CP29K30 | Does not tune channels | C102[47pf] | ||
| LG | CP 20K42 | Normal image appears and goes dark | D502 | ||
| LG | CP20B85 | Image shifted to the right. | Zener diode zd412 (9.1v) - change unconditionally. | ||
| LG | CP-29K30 081D | Dead | Shorted diode d401 (ru4ds) |