42PJ350 TV Repair: Common Faults and Solutions.
Search: 42PJ350
Results: 39
Results: 39
42PJ350 Repair Guide: Common Issues and Fixes
Brand | Model | Fault | Detailed Problem | Solution | By |
---|---|---|---|---|---|
LG | 42PJ350 | Do not turn on, relay arming and disarming right after calling. | Cold weld in the main power supply. | Resonold in the pins of all transformers, mosfets and power resistors. To avoid future failure points, also resolve components in which they appear to have little welding. | Moises |
LG | 42PJ350 | Normal operation, however, after some time it keeps turning off and on indefinitely. | Thermal pad of the mosfets dries up, solution remove the screws from all the mosfets, remove the old paste and apply new paste to finish, replace the screws. | Ferraz | |
LG | 42PJ350 | Does not tune channels | 22Ω resistor connected to pin 71; from IC 602 or the bad IC itself, in my case it was the IC | Replacement of IC 602 or resistance connected to pin 70 | Cabeça |
LG | 42PJ350 | Grainy picture and black spots | All ysus components were tested, none of them were bad, I went to vsus, the defect was vsus, even without a single bad component it was showing this problem. | Faulty vsus and not a bad component | Cabeça |
LG | 42PJ350 | Turns on without picture, voltages are all ok, says voltage vsc=135-+ | Fuse fs201 open | Cabeça | |
LG | 42PJ350 | Blurred image | Resistor set down r729 2r2 2w aberto | Replacing the resistor | TECCENTER |
LG | 42PJ350 | League without image | Measuring voltages of +15vf +5vf were high and oscillating, the cause was the breakage of the copper wire in the t501 transformer | Resoldering the wire or changing the t501 transformer | Kel Araujo Assistência Técnica M6 |
LG | 42PJ350 | White strip at the bottom and off | Cold solder on the large coil l1 of the zsus board | Marcelo | |
LG | 42PJ350 | Turns on with everything perfect, works for a short time, turns off, and turns on constantly. | Check the insulation of the internal wires of the lvds signal cable, in my case the heat from the TV dried out the covering of the wires and it peeled off, leaving them shorting each other | Arrange for the cable to be replaced or, in my case, insulate, (I used hot glue) | Edfersom |
LG | 42PJ350 | Does not tune channels | Replacing the 20r smd resistor r-643 which is close to the ic-602 | On some devices it is under the glue on the hdmi connector | Pedrinho |
LG | 42PJ350 | Turns it on, hits the relay then turns it off | Shorted power supply board | Diodes: d801, d802 and d304 open, resistors r101 and r998 open, zener diode zd 701 shorted, capacitors 360 and 361 with leakage, 2 transistors fchs20a12 (ey552 and ey553), 1 transistors fcf10d60- ey512 shorted | Gbrito |
LG | 42PJ350 EAX61332701 | Dark image, blurry image, grainy image, | Ysus defective replace r-729 | Replace the 2r2 resistor with another equal one and check if tsound is cold soldering on the ysus and power supply. | Maike Sorriso-MT |
LG | 42PJ350 | Drizzled image | R729 2r2 open. to replace. | After changing the r7129, it showed a greenish vertical stripe on the right side, cleaning the t-con flats resolved it. | TECNOBRU SBC |
LG | 42PJ350 | Arms and disarms the relay, without tension vs and va | Leaky transistor q358 | Replace transistor q358 | Arnoltec |
LG | 42PJ350 | Does not tune channels. | R642 or r643 open | Replace, the value is 22r. | EDTV Miriambi |
LG | 42PJ350 | Gives sound. tsound is no image | All panel voltages ok, 15v@18v ok. tcon led off. | With the TV on, I tapped the tcon's ic xd and the image appeared. bga ic xd failure. replace tcon | Emoniz |
LG | 42PJ350 42PJ350-SA | When turned on, the relay arms and disarms | Ysus shorted. Short identified on the board's fets, possibly caused by dry thermal paste. | Replaced two 30f124 and two 30j124 that were shorted and applied new thermal paste to all components of this board. I also advise you to resolder the power supply board and zsus, as they were already quite bad. | Flavio |
LG | 42PJ350 | Power supply arms and then disarms | Transistor q-906 shorted. | Replace the same | Régis |
LG | 42PJ350 | The TV turns on and has all the voltages and sound, but tsound is no image. as x normal league. | Ic100, reg 3v3 smd atrás tcon. | I fixed it and it came back normal | Joaomvjr |
LG | 42PJ350 | Image with blurred black spots | Resistor 2r2 r729 open y-sus board | Note: this defect also appears on the 42pj250 | eletronica junior reginaldo moronte |