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LG Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
LGRP29CC25
MC-022A
Impossible to enter service mode via remote controlOmission of technical information!The LG 29cc25 television does not enter “service mode” using the menu keys! You can only access the service menu and make adjustments using the 105-201m service remote control, which is only sold by the manμFacturer to authorized workshops – see adjust remocon 105-201mPh
LGLCD
The standibay light does not turn on, it lights up normally as if it were on, it takes a while for the image to appearFour 1000uf/10v capacitors, it sends 5v to the secondary wsound it makes the high power supply workanderson
LGRP20CC25
Intermittent synchronismTwo TVs of the same model and with the same symptom, when turning on after a few minutes it would lose synchronization and alternately going in and out of synchronization. solution: resolder the ci 501.edircap
MONITOR LGT730SH
No image or it is too darkMeasure screen voltage on g2 on the tube plate, replace c320 102/2kv and c341 102/2kveletronica fernandes
LGRP 29CC26
Doesn't workFaulty horizontal output transistorPlace bu2520dx works perfeitlyalpha eletronica
LGTV 29FX5CL
29FX5CL
Excess width, when you turn on the image it gives excess widthO capacitor c 407 ..aberto ...22nf/400vReplace do capacitor c 407 22nf/400vhouse eletronica
LGCP 14B86
SC023A
When turned on, everything was perfect. Then it gets dark and sometimes it turns darkD502 (1s2471)Without it the TV works normally, but it's better to replace itSantofofo
LGRP.14CB25A
Swinging imageUnstable power supplyCi. power supply photocoupler direct replacejosias
LG20CD2R
It turns on normally and after a few minutes it starts to close the sides and turns off.Ci 802 photo couplerAlvanyr This email address is being protected from spambots. You need JavaScript enabled to view it.
LGCP29K30A
Sound and; image with very little brightness increasing the screen on the fly (both on TV and AV)Q509 with leak, killing the rgb signal in the buffer (q506/7/8)MAIRES
LG29CC25
Burning transistor horizontal outputFly back replacementdaniel alves da silveira
LGRP 29FE80
When it turns on after 2 minutes it makes a strange noise in the speaker and it turns off and then turns onPoor contact in the volume and channel board connectorc@rlinhoselectro
LGSTUDIO WORKS55I
Turn on the screen is all green,Verfiicar trimpot adj.+b c want contatoI adjusted it and it resolvedEronaldo
LGSTUDIO WORS77I
Turns on and nothing lights up, the voltage on pin 12 of IC 901 keeps oscillating, 150vts is normal.Changed r914 47k and blzEronaldo
LG - MONITORT730SH
CM-54A
This monitor was getting dark and when adjusting the screen it would get a little blurry, but it would soon return to normal brightness, but it would quickly become dark again.The defect was the ic2476, after changing it the monitor started working normally again.Moizes
LGRP20CB20A
Vertical closedNever trust the test470r resistor in position r301PALUX
LGRP20CB20A
Vertical closedDon't trust the testAltered 470r resistor pos.r301PAULO CESAR
LGRP-20CB20A
League,intermittentCap.802 shortJACKSSON
LGRP29CC25
Does not turn on (stand by)Shorted horizontal transistor takes together 3 resistorsQ401 / r864 / r865 / r866cesar_unitec
LGCP20B85
Image flickering and colors not definedFly back 6174v 8004d leaking high voltage, it was replaced and solved the problem.Jaison