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	29CC2RL	Tv with red screen and retrace lines	Tube socket	Replace the same	eletronica shalon
LG	29FS4R	Turns off after a few seconds.	Protection problem.	Testing r843, 220k.	lou
LG	RP-20CB67	Sometimes I tuned in and after a while I left	Several tests were carried out on the 33v +b and clok and data and the signal was inserted into the fi, it was found that it was the tuner	The replace of the same	HIPERELETRONICA SERVICE(MARCELO)
LG	RP-14CB25A	Without horizontal synchronism, both in rf and av	Several tests and rewriting of the eeprom were carried out, the famous diodes were replaced and nothing was done until we reached the conclusion of the micro	Micro ic 501 replacement	HIPERELETRONICA SERVICE(MARCELO)
LG	W	Turns off after 3 seconds	Wire that turns on the LCD lamp loose	Disassemble the LCD and solder the wire
LG	21FU4RL-LS	Alters for 5k6	Shameless breastfeeding	Alters for 5k6	EletroClaudio Aguas Belas
LG	RP-20CC25	Turning off after a few minutes, normal image and sound.	Fr403 (1,2r) ok.	In this case it was the r420 (240k) connected from ground to the emitter of the q403 close to the fly-back. It was open.	Manoel (Noca)
LG	21FJ6RB	Shorted flyback	Doesn't work	I replaced the original flyback with the Toshiba at- 2079=ao it was a gem.	oilec
LG	29CC2RL	Doesn't start	Transistor 809 open emitter	Obs don't turn on the relay	This email address is being protected from spambots. You need JavaScript enabled to view it.
LG	21SA1RL L4	No sound or sound only in the av	Ic 605 la 72703		www.teteletronica.com.br
LG	20CD2R MC59	Does not turn on (LED on, normal power supply) seen protection, FBT, clock, eepron everything ok	R 512=4k7 open on pin 18 of the micro		francineutom lima
LG	RP-29CC26	Knocking relay and blinking led - doesn't work.	Zener diode 803 6.2 volts short	On the schematic it says 5.1 volts, on the chassis it says 6.2 volts.	std eletronica(PALMEIRA)
LG	21FS4RLG	Blurred image. turning off after a while and with a light point in the center of the tube.	After cleaning the socket and re-soldering it, the focus was normal and the light spot came out. After replacing the damaged r420, the TV no longer turned off.		Gilcimar Rocha Pereira
LG	RP-14CB25A	Reduced width with return lines and then turns off	Photo coupler	You can put the photo 817 and it works normally	ELETRONICA ELETROSONIC
LG	29FS4LG	Vertical half closed when you twist the PCI normalizes	Change the vertical output (with internal flashing) see smoked resistor under the ci		WARLEY CESAR
LG	HT502	No sound, turns on normally and outputs ok.	Reprogram eeprom, see service manual		joaomvjr
LG	32LG30R	The LED lights up, but tsound is no image or sound. stays on standby	Replace the r 128 with a 15k one, if it doesn't work increase it to 22k, remove c108- zd111 and z112 and replace c 207 and 208, both 3300/10v.		joaomvjr
LG	37LH20R	Turns on, normal, disappears image and remains with sound	Protection acting	Add res 220Ω between the 12v line and pwm-dim and zener 3.3v with cathode to pwm-dim and the anode to ground	cabessãonatal
LG	CP 20B85	Turns on and then turns off (returning to stanby)	Vertical circuit failure. to make sure, open the emitter pin of transistor q 13, connected to the IC 804 regulator. If the TV turns on and stays on, the vertical defect will be confirmed.	Check components in the vertical amplifier line. in my case it was the 82k r313 that was open. After changing the TV, it returned to normal.	Denilson serviços técnicos
LG	20CD2R	When the TV was turned on, it worked normally, after a certain period of operation, the image at the top reduced as if it were vertical...	Changing the photocoupler (changed)		neilson nicacio (sonivídeo assistência)