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LG Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
LGRO-21FE85G
MC
Vertical closed and shutting downChange regulator ic803dney
LG21FU4RLG
MC-059C
Power supply inoperative, noisyIc 501Replace microBUBINA MARLEY
LG29FU6TL
CW-62D
Without image and with sound. when increasing the screen it has a rainbow effect.Vertical ic301 la78141.Replacement la78040, tda9302h.R-TEC Eletrônica
LGRP 21 FD 10
BRS
It works but tsound is no image, tsound is a big circle in the center of the trc, you see it and think it is a yoke (coil).After some tests I realized that the RGB worked but had no effect.Replaced the kinescope and it was just joyDé Andrade
LG29FS4RLG
Cushion effectCapacitor c-461 47n x 630vFabio Andrade
LG21FU4RL
White screen with no imageMemoryReplaceELETROCLAUDIOPE AGUAS BELAS
LG MONITORFLATRON L1753T-BF
The screen was black, only the blue light from the LED worked!Even though the power supply fuses are not "blown", they can be damaged!Replace all power supply fuses!leandrobentes
LGLG21FE85G
Turning off in 3 secondsRemove tr 16 (turns off protection)HP ELETRONICA
LG29FU6TL
Vertical closedD301-1n4005Replace without measuring,ADRIANO..RIO VERDE MS
LG20CB20
023A
LED blinks, beeps and doesn't turn on (it started turning on when it wanted to).S826Replace and run for the hug.R-TEC Eletrônica
LG LCD32LG80FD
Doesn't start at allSee r526
LG32LG30R
Does not turn on lights and no sound, no 24 and 12 power supply.Change c118 (220nf), it is connected next to r128, tsound are cases when the r 128 is changed and components are removed and it continues to not turn on. 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
LGCP-15Q90
Does not turn on stand by ledCapacitor 470pf x 2kv with leakage - position c 417Matões A. Técnica
LG32LS3500
Inverted imageSim
LG21FU4RL
Plug it into the socket, the LED lights up, press a button, it goes out and lights up again and it doesn't oscillate horizontallyC 525 shorted killing the 9 volts of the microEdimilson de Osasco
LG21SA1RL-L4
L4
No normal video, sound and image on AV outputCapacitor c511 shorted on the processor pin 49 lineReplace the c511 with a 100μF/16v one.NelsinhoPira
LG29CC9RL
It works for a few minutes and turns off on its own.Change photo coupler.Ademar Videira SC
LGCP 21Q24
It doesn't oxilate, it has a normal +b in the secondary, just don't worry about +b at the output of the 78mr12 regulator.Change the ram.Ademar Videira SC
LGTODAS
On most LG televisions they work perfectly, but after a while the image disappears.Resolder to tube plate.Ademar Videira SC
LG21FJ6RB
Without a power supply completely stopped when measuring the horizontal on the board all the pins seem to be shorted but it is goodFly backAnd just replace it and that's itBETO ELETRONICA ACRELANDIA ACRE