Lg Repair Tips

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Results: 4876

Make	Model	Symptom	Problem	Solution	By
LG	CP-15Q90A SC-023A	Does not turn on - stuck on standby or the LED blinks when power on	After testing flyback, normal vertical and other capacitors	Replace without measuring c831 and c826 defect resolved (bushing).	MARCELO RODRIGO QUINELATTO BIRIGUI-SP
LG	CM4330	Intermittent, sometimes it turns on normally, other times it turns on a squeaky sound and goes into protection!	Altered zd904 diode, in the test it may appear as normal!	Replace without measuring!	Doremilton
LG	42LH20R	Lamp protection	Remover o d401 d402	If the lamps have gone out
LG	CM4340	Does not turn on completely off inoperative	D926 is d923 sb360 shorted at the power supply	I put 2 fr 306 diode ready and it works again as it came out of the box	Reis eletrônica
LG	49LX300C 43LX300	Does not turn on, LED is off or flashing, killing the 19v voltage	Leaky mosfet smk630	Remove the smd and place an irf630, cutting the metal part and soldering it to the board as if it were an smd	Adrian (Chapadão do Céu Goiás)
LG	32LC3R 32LC3R	When turning on a cold TV, the HDMI input has no signal and noise in the sound... little by little the sound becomes ok and the perfect image appears	Apparently defect in the main, but this defect is in the power supply	Substituir c210 680μF x 10v	Tarcisio
LG	32LN5400	Restart	Nand	I bought another new nand and put it in and it was 100%. Always try to save the board, as this board is getting rare and expensive.
LG	32LN540B	Screen off with audio	LED bar defect	Tv lg 32ln540b the image disappeared and only the audio remained (leds defect), it was sent for repair and they charged R$400.00, 90 day warranty...a few days after the end of the warranty the defect returned. The owner gave up on the TV and bought another, leaving it with me to study. I disassembled it and saw that only one LED had been replaced and it was the one that failed again. One note...without appropriate welding equipment, the replaced LED may be far from the LED bar, wsound heat dissipation is compromised and for this reason it burns again. Aiming to remove a LED bar and keep the rest of the parts for future repairs, I bought a similar TV for R$ 170.00 (with the screen broken, but showing the image normally) and when dismantling I saw that one bar was missing two LEDs (which had been removed and made a direct connection) as I used one of the bars that was good to repair the other TV, I put the other one missing an LED on it (directly connected), so the one with the broken screen started to work with three less LEDs. Originally this model has 22 LEDs and I could see that now with 19 it is not possible to notice this lack in the image shown, but it would certainly overload the circuit. This TV uses 3 volt LEDs (it would be 66 volts for maximum brightness) the LED power circuit provides, in relation to ground, more or less 130 volts which, after crossing the LEDs, passes through a circuit that regulates this voltage. I didn't achieve anything with a resistor in series, I placed a 33Ω resistor in series with the LEDs to see if it would compensate for the lack of three, but the regulator circuit increased the voltage and the voltage that supplied the LEDs remained the same. So I wrote down the values below which suggest that even if the three LEDs are missing, if the energy saving function is in the minimum saving position, the LEDs will work without any overload (measurements taken with a digital TV channel showing a film and with the image mode : standard). measurements taken on the TV wsound 3 LEDs were missing: energy saving: off 66.7v/minimum 53.2v/average 38.6v/maximum 17.3v measurements taken on the TV with all 22 LEDs: energy saving: off 76.9v/minimum 62.3v/average 46.2.6v/maximum 24.7v conclusion: It is highly recommended that this TV model never has the energy saving function turned off, as in a circuit with 22 3 volt LEDs it is receiving 76.9 volts as seen above, in a short time an LED will burn out and turn off the screen.	littlecarlos
LG	47LM6400	Turning off after 5 to 10 minutes and then only turning on again if disconnected from the socket	Faulty power supply	Replacing resistor r103 smd (nominal value 8203) open, just replace	MULT INFORMÁTICA E ELETRÔNICA
LG	M237WA	Turns off the screen and the sound remains normal	Cold welding t304 inverter power supply		Marcondes Ohm Eletrônica Jaicós PI
LG	42SL80YD	Only the backlight on, no sound and no image, white screen	Cold solder on the bga ic100 microprocessor on the main board. same thing as the friends above	Reflow processor	Saltech
LG	21FJ6RB	Vertical deflection with 30% opening with trapezoidal effect on the image showing convergence lines.	Shorted deflector coil.	Replace deflector coil.	Leandro Ferreira Braga (Eletrônica Tesla)
LG	29FS4RL CW62A	Turns on the power supply weapon, the voltage comes on, it hits the relay and it disarms	Check resistors r830 and r831	In my case, the resistor r831 (62k) was replaced and it worked. good luck. only Jesus saves. (electronic service)	Servitel Eletronica
LG	29FX5CL CW62C	Turns on the power supply weapon, the voltage comes on, it hits the relay and it disarms	Check resistors r830, r833 and r831	In my case it was the r830 resistor (91k) that was replaced and it worked. good luck. only Jesus saves. (electronic service)	Servitel Eletronica
LG	K10 K430 TV	It doesn't turn on, it doesn't show any signs of life, but the battery charges	32 bad oscillated crystal replaces the same.
LG	RP29CC26	Vertical closed at the bottom	Tda4863aj replacement		Beto eletrônico
LG	RP29CC26	Vertical closed at the bottom	Tda5i63aj replacement		Beto eletrônico
LG	32LG30 42LG30	Does not turn on, only LED is on	C 1145	Replace c 1145 47x16 and I also replaced the 3 100x16 c1110, 1118 and 1128 to prevent it from coming back with another defect. The 1145 had a strange appearance so I decided to replace it, but the measurement was perfect.	Josimar
LG	42LS3400	TV turns on with sound, no image and no backlight	Short SMS capacitor c204 on the driver board left side of the display	I found a replaced LED in the backlight, after assembling the TV it still had sound, no image. I noticed on the tcon board that tsound was no vdd voltage and that the short came from the left side screen driver (right side with the TV mounted), I then found c204 shorted, after the replace the TV started working normally again. It is worth mentioning that they also check c221 and c223 which are in parallel with c204, but in my case it was "c204".	Edumiguez
LG	CP-20K42	No image normal sound increases screen nothing appears	Diodos 501 e 403 em cuto	Replace them and run for the hug