Trouble Shooting - Usb Connection Error - LG 42LE5400 Service Manual

19. Trouble shooting - USB connection error

Check USB 2.0 Cable
If device is 2.5 inch HDD,
Check power adaptor
Check 5V voltage level at Bead or Jack
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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Only for training and service purposes
N
Check USB device
N
Check USB jack
Y
(P300 or P301)
N
Y
N
Replace Jack
Replace one of
IC301 or IC302 and then check
LGE Internal Use Only