Lg Repair Tips

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Results: 4933

Make	Model	Symptom	Problem	Solution	By
LG	CM8340	Cuts audio when volume increases	C920 or r919. measure voltage on the c920 value =100mv, if it is lower the problem is on the c920. check r919 out of circuit 1mega		Chicoalagoinhas
LG	32LB550B LT43B	With sound and no image, but backlight on	Transistor q 405 on the main PCI burned out, I replaced it and the TV kept restarting then I found capacitor c135 on the screen board short, I replaced it and it worked perfect	Q405 main board and C135 screen board.	MARCELOTJ
LG	29FS4RL	Relay doesn't turn on	C405 shorted	Colocar capacitor 1k 2kv	ma eletrônica
LG	CM4350	Without sound and then protection activates	Ic 931 78r12 dando 8v	Replace ci 78r12	JRN
LG	42LH35FD	LED blinking with no image or sound. 5v voltage was oscillating between 0v and 2v.	C871 shorted on main board	Swap c871	Paulo Russo
LG	32LE5300	Turns off the backlight by itself after a few minutes on	Reformulating the previous tip; Looking a little more, I found the cause of the defect. It is the zd7 diode (it is a double diode) on the inverter board that is defective, it regulates the 3v3 voltage of the driver on and dimmer pins. put 2 3v9 zenner diodes in its place.		EC
LG	32LE5300	Turns off the backlight by itself after a few minutes on	Reformulating the previous tip; Looking a little more, I found the cause of the defect. It is the zd7 diode on the inverter board that is defective. put 2 3v9 zenner diodes in its place.		EC
LG	CM5660 EAX66901201	Does not turn on standby well, power supply defect	Photo coupler pc901 c902 pc903 and te431 ic951		ELETRÔNICA MUNIZ BAHIA
LG	32LE5300	Turns off the backlight by itself after a few minutes on	If the backlight LEDs are working perfectly, check if the voltage entering the inverter board at the drvr-on pin drops from 3v3 to +/-2v when the backlight deactivates.	If the driver-on pin voltage remains at 2v2, short the side pin (PDIM 3v3) to the driver-on, thus forcing the backlight to remain activated, it is likely that the defect is caused by the main board, some component on the Defective driver on line.	EC
LG	42PN4600	TV doesn't turn on	Short on the y-sus board (brown board with black heatsink)	In my case the short was in the IGBT transistor rjp63k2 (q703, on the underside of the board). To find out if the short is on the y-sus board, simply remove the power cable from that board. If the TV turns on without video, then the problem is with it.	Darci Denzer
LG	14FK3RB	Horizontal black stripes at the top of the screen (these are wobbling) you would also notice a thicker white stripe	220/35v electrolytic capacitor c309	Replace without measuring	Norte Eletrônica
LG	RP-21FE85G	Works with the normal screen by injecting signal into the inputs, antenna or AV, closes vertically and turns off.	Memory c2404	Replace, in my case tsound was no audio, adjust through service mode,	MaTões Ass. Teécnica
LG	32LF20FR	No standby, green LED on main access, all power supply voltages ok.	The 3.3v standby voltage was missing	Regulator ic1007 was dropping 2.1v. Replaced and worked normally.	Eletrônica JJ
LG	CP-20J50BRS	Turns on turning off entering protection	Ic 301 vertical ta840k c829 100mf 160v aberto ic801 foto acoplado	After changing the components, the TV returned to normal	Cicinho
LG	32LV2500	LED off does not turn on	Capacitors 453+456 on the main board near l2	Remove the caps. go for the hug	rn eletronica fortaleza ce
LG	42PQ30R	No image with sound	Main board	Do the auto gen, if it shows an image just replace the main board	Cabeça
LG	29CC2RL	It does not turn on or light up on stand-by, when turned on it only activates the primary power supply and remains off.	R-830, 831 and 833, one of them with impedance changed to higher.		SANTANA
LG	50PB560B	Connects with audio, without image.	C205 shorted and charred. it is under the glue of the transformer on the y-sus plate	C205 replace	Marcelo Piranga
LG	42LG80FD	LED flashes blue and red	Voltage varying	Boot q203	FRANCISCO FERREIRA
LG	CM-4320 G-10 F-5	Turns on without sound, everything works, but turns off after + or - 3 minutes.	Diodo zener zd-904 de 10v	Measuring on the plate, low scale, it measures good, but outside the plate, on the high scale, it measures short.	Pedrinho