How to troubleshoot an LG 21FU6RLX with picture but no sound?
If your LG TV shows a picture but has no sound, you can try the following: Check or replace TU101 or the input signal. Alternatively, check or replace IC11. You may also check the voltage at pin 57, 58 of UOCIII. Other components to check or replace include Q603, IC601, and R823, D826.
What to do if my LG 21FU6RLX has no picture and no sound?
If your LG TV has no picture and no sound, you can try the following: Check the receiving system in the MENU and execute Auto-Program, or store on manual-program MENU. Check the waveform, IC11 pin 83, and the SMPS Trans. Also, check pin3 Reset Voltage and pin8, 12 SCL, SDA & SCL, SDA Line. You can also check IC11 pin 83, 84, 85 (R, G, B out) or replace IC11.
How to fix an LG 21FU6RLX TV with no raster?
If your LG TV has no raster, you can try the following checks: the B[+ ]at D829 cathode, the fuse of the AC line (and replace if necessary), and the in/out of the regulator (IC822, Check pin 73 of IC823, IC824). Also, check the voltage of IC11(H_Out) C832. You can also check or replace IC11, DB801, Q402, and IC810, or check the voltage pin4 of IC810. Also check T401 & each pin voltage. Alternatively, check Q402 collector waveform, Q401collect waveform, the fuse and diode of secondary, and replace Q401, IC810, IC802, Q830, and T401 if needed.
Essential safety advice, handling, X-ray, and AC leakage procedures.
Defines applicability, conditions, and technical parameters.
Notes and steps for focus, purity, and convergence adjustments.
Procedures for adjusting screen voltage, white balance, and deflection.
Default data managed by EEPROM Master for service levels.
Procedures for entering shipping mode and related settings.
Details on PSM, option settings, and shipping condition table.
Diagnosing problems with RF-stereo and no raster/sound.
Diagnosing scenarios with no picture and no sound.
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