Read LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual online
17. Trouble shooting - USB connection error
Check USB 2.0 Cable
N
Check USB jack
(JK8300 or JK8032)
Y
N
N
Check USB device
If device is 2.5 inch HDD,
Check power adaptor
Replace Jack
Check 5V voltage level at Bead or Jack
Y
Replace one of
IC8301 or IC8302 and then check
N
Maybe BCM3549(IC900)
has problems. Replace It.
• 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)
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