LG 21FU6RLX - Picture;Sound Troubleshooting; No Picture;No Sound Issues

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4) No Picture/ No Sound
Is any OSD displayed?
OK
NO
NO
OK
OK
NO NO
OK
OK
NO
OK
OK
OK
P904A (R, G, B out
of IC501)
P904A (R, G, B out
of IC11)
Replace IC11
Check pin8, 12 SCL,
SDA
Check IC12(EEPROM)
& SCL, SDA, Line
Check pin3 Reset
Voltage
Check IC11 pin 83,
84, 85 (R, G, B out)
Check SMPS Trans
Secondary Voltage
Go to No sound/
picture OK
Check the waveform
pin73(H-out)
Check IC11 pin 83,
84, 85 (R, G, B out)
Check receiving system in MENU
& execute Auto - Program
Does the auto - Program
operate properly
Store on manual -program MENU
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