LG TV Repair: Common Faults and Solutions.

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LG Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem	Solution	By
LG	21FJ8RL CW81B	Normal connection with the vertical closed!	C311	Replace the 2200μF25v c311 without measuring and the TV will work normally. God be praised!	Sinailson furtado
LG	32/42LD460	Stuck on lg logo or turning off by itself	Ar 1201 and ar1202 open, banks of resistors, located close to the processor.	Measure them all and replace them for the same value	Alex Lopes <small>This email address is being protected from spambots. You need JavaScript enabled to view it.</small>
LG	14SB1RB	Secondary power supply below 90v	Photo-coupler		fabiusmax
LG	CJ87	Does not turn on or turns on from time to time	X500 and x501 crystals. After heating it turns on...	Replacing it... removing x501 from old cell phone cards, tsound are lots of them. x501 removed from tablet board, exactly 24mhz, they are a little bigger, but they fit perfectly...	cricascell
LG	29FS4RL1	When turned off, the LED doesn't even light up and the fuse is burning. This TV was burned by lightning.	Shorted rectifier bridge	Mat cap25 ves40 every time you did good to your brother, you did it to me. said the king.	<span class="xxsmall">ELETRONICA NOSSA SENHORA APARECIDA</span>
LG	50PK550	League, no image	Reballing	Replace the processor balls - autogen before	Eletronica Jambeiro
LG	47LM6400	When turning on the TV tsound is sound but the image takes a long time to appear.	When connecting the TV, the output of Q2407 (Mosfet for Chanel) does not show 12V (panel power supply). the gate voltage determined by the resistive mesh r2441, r2442 and q2406 was around 11v, that is, very close to 12v, with tsound not being enough vgs to drive the mosfet. It was observed that the gate voltage slowly decreased to a value around 8.5v, causing the MOSFET to conduct and the presence of 12V on its drain, resulting in the TV image. as q2406 is responsible for the voltage value in the gate loop, it was replaced.	Replace q2406 (mmbt3904 manμFacturer nxp).	Valmir
LG	14FK3RB L2	No sound, turns on with normal image.	Change or remove capacitor c912.	C912 shorted.	Jadson G Nascimento
LG	DHL 625	Doesn't start (dead)	Replacement of the diode in the secondary power supply d953 (sr306), diode was shorted		MARCO FERRI
LG	32LX330C	Burning leds	LED voltage changed	Replace 2.7Ω r816 to 4.7 homs	Raimundo Antônio-Acre
DVD LG	DV361	Does not turn on, or takes a long time to turn on.	C121 and d121 changed	Swap c121 and d121	MARCONES DE ARARIPINA-PE
LG	42PQ30R LG	TV turns on, stays on for a while or days and turns off.	Power supply capacitor in position 829 with broken solder. solution to solder the capacitor terminals.		All Master Eletronica
LG	CM8440 CM8440-AB	The front panel LEDs are off	C 130- ceramic capacitor shorted when connected to the 12v line	Replace.	JOÃO ELETRONICO
LG	21 CW81A	Replace r839	839 resistor replacement	Replace r839	Cícero ajude pra se ajudado
LG	49UB8550	Turns on without image and without LED lighting	Cold soldering processor	Do bga	Andrei lowe 051991421340
LG	32LV300C	Power supply turns on and off. When turned on, it makes noise as if the transformer core was vibrating.	16v zener diode zd9108 shorted.	You have to remove it from the circuit to measure the short.	Persio (TVCompany)
LG	32LD420	Whitish screen, background image appears more or less normal	Capacitor c659 22mf/16v shorted, next to the flat connectors.	Replace capacitor with another and the 8v voltage returns to normal	GRINGO SERVICOS
LG	14SR1AB	After a while when connected, functions lock, won't turn on, remote won't work.	X502 32.768mhz crystal, just heat it with the soldering iron and the defect appears.		mfelipe
LG	28LF710B	Does not turn on power supply voltage dropping	Capacitor c920 leaking	Replace the 2 smd capacitors c918 and c920	Lucafer
LG	42LA6130	TV turns on normally, if it turns off it won't turn on again. After unplugging it, it turns back on.	Exhausted capacitor	C201 - 1500/10v	José Alberto Borba Bittencourt