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	20CD2R	Tv lg /fly-back 6174v6017= jf0501-19975 =2079ao ok guys, hope I helped	Fly-back 6174v6017=jf0501-19975=2079ao ok guys, hope I helped		JNETO NATAL R/N
LG	14FK3RB	Vertical closed	R313 (47k)		Baguatech
LG	42PT250B	TV turns the stand by LED on and off but does not arm.	Q708/q709 shorted, possible voltage variation.	Ysus board swap q708/q709 irg7ic28u (original).	Igtec
LG	CP 15Q90	Other channels ok, only channel 11 is drizzling and sometimes doesn't tune in	Defective varicap	I put another one in and the TV was beautiful	ELETRONICA CARLOS
LG	RP29CC90 MC049A	Front keys inoperative	C. 23 (0.1uf) e eeprom	Rewrite the eeprom and replace the cap. c23 without measuring	herivelto
LG	21FS4RLG	Vertical closed	Polyester capacitor with crack under part c412	To replace	ELETRÔNICA MEGATRON
LG	PR-21FB32	TV taking a long time to turn on, blocking functions and no channel, just chivisco.	Altered d-22 diode	Replace the same one for a new one!	adriano SB
LG	14B86	No contrast blurry image	Replace d501,d502		pedrinho tela quente
LG	21FJ6RB	Turns on and then turns off, when removing q16 it comes with a closed vertical and heats up the vertical output	C314	After dismantling practically the entire vertical I found c314 shorted.	ZÉ LUIZ
LG	42PB2RR	Turns on and off then standby LED flashes without 160v from the panel and sus	Electrolytic capacitor and transistor	Replace of c801 10/63 q801 2sc 3198	ELETRO CENTER
LG	W1942S	Monitor inoperative led off	Power supply fet shorted	Fet stk 0765 3 pins was not found in stores or on the internet, I tested it with the 2sk2545 and it worked perfectly	GIOVANNE AVELLAR GSAELETRONICA
LG	RP21FX5RL	No image normal sound all power supplys normal filament normal high and rgb normal	Profit	Disconnect the scrim cable, open it as far as it will go and press a few times until the image returns	edezio eletronica
LG	14SB1RB	Closing vertical and shaking at the top of the vertical	Just change the photo coupler, ok.		by eletronica rio real bahia
LG	21FJ6RB MC059A	Only in standby, the TV does not oscillate - tsound is no 10.5 volts on the capacitor c825=22oomf-16volts, tsound was only 6 volts.	It was the defective strw6753, I changed it and went for it.		ELETRÔNICA MELO BOA VIAGEM -CEARA
LG	LM-U550A	No audio	Ic 901 - str-w6753 can replace with str-w6754 / pc901 - coupler / ic 949 - tl431	Replace mentioned items	eletronicaapolo
LG	CL21M6MQ	Horizontal oscillator out of frequency, no sound sometimes image with reduced width other times no image at all, heating up the horizontal output	C 414 of 47k of the abl circuit shorted or passing through its encapsulation.
LG	42PJ250	Turned on but turned off again	After changing the power supply for a new one, I started tuning the respective TV, but the power supply went down, I turned the TV off again, but nothing, I disconnected the ysus plug, I measured it and the voltage values were correct, I turned it back on, I measured the voltages on the plug and nothing. I disconnected the 60v plug and the TV started working but with no image resulting in a short circuit in the panel plug (horizontal part).
LG	LG42PJ250 ZC	As soon as it turned on it turned off again	D701 5v burnt out in power supply
LG	32LG30R	It turns on normally, but then the sound disappears or turns off.	The components were removed from the power supply and the r128 was changed from 10 to 22k, but it continued so I decided to resolder the IC801 on the logic board, I resoldered it with an iron and solder, with the air station it didn't look good, new solder has to be melted. Resolder the other ICs too.		joaomvjr
LG	RP21FX5RL MC 059	Turns on brightly when turned off and turned on again without brightness	C529 close to the selector with low capacitance		gilberto