LG 42LH35FD (CHASSIS:LJ91A) Service Manual ▷ View online
12. Component / RGB / AV Audio Trouble Shooting
Y
Check Jack JK700/JK703/JK704
N
Replace Jack
Check Video Output
N
Follow procedure external input
video trouble shooting
Y
Check Signal
C204, C205
C206, C222
C210, C211
C217, C218
C220, C221
C206, C222
C210, C211
C217, C218
C220, C221
N
Replace IT
Y
Follow procedure All source
audio trouble shooting
N
Maybe BCM3556 audio block has
problems. Replace It
13. HDMI Audio Trouble Shooting
Check video output
Y
Follow procedure All source
audio trouble shooting
N
Y
Re-download EDID data
Maybe BCM3556 audio block has
problems. Replace it
N
Follow procedure HDMI video
trouble shooting
N
Replace IC601
14. USB Trouble Shooting
• Exception
- USB power could be disabled by inrushing current
- In this case, remove the device and try to reboot the TV (AC power off/on)
Check USB 2.0 Cable
Y
Check JK1403
N
Y
Y
Check USB device
If devuce is 2.5 inch HDD,
Check power adaptor
Replace Jack
Check 5V voltage level at L1407
N
Replace one of
L1407/IC1402 & Recheck
Y
Maybe BCM3556(IC100)
has problems. Replace It.
N
Y
Maybe IC1402 has problems
Replace It.
Check USB HDD more 40Gbyte
N
Replace HDD
Y
15. Digital TV Recording Fail Trouble Shooting (USING USB HDD)
Check video/audio output
Follow procedure digital TV
video/audio trouble shooting
N
Maybe BCM3556(IC100) USB
block has problems. Replace It.
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