Read LG 42LG70YD (CHASSIS:LJ83A) Service Manual online
- 31 -
Check video output
Follow procedure All source audio trouble
shooting
Y
Follow procedure HDMI video trouble
shooting
N
N
Maybe BCM3553(2)(IC100) audio block
has problems. Replace it
Check EDID NVRAM (IC700, 603, 604)
Power & I2C Signal (#5, #6)
Replace it or redownload
Y
N
Check USB 2.0 Cable
Check L205 voltage level 5V
Y
N
Replace it or IC202
Check P201
Replace it
Y
N
Check USB Device
If device is 2.5 inch HDD, check power adaptor
Y
Maybe BCM3553(2) (IC100)
has problems
Y
• 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)
13. HDMI Audio
14. USB
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