User Guide

8965 N/B Maintenance
8965 N/B Maintenance
115
Re-test
OK?
No
Yes
No
Yes
Correct it
Replace another known good USB device.
Replace
Motherboard
Correct it
Test
OK?
Board-level
Troubleshooting
Check the following parts for cold solder or one of the following parts
on the mother-board may be defective, use an oscilloscope to check the
following signal or replace the parts one at a time and test after each
replacement.
Parts: Signals:
+5VS
+VCC_USB_[0..3]
USBP2+
USBP2-
USBP3+
USBP3-
USB_OC0#
USBP0+
USBP0-
USBP1+
USBP1-
USB_OC1#
SW_VDD3
U711
U18
U1001
L15
L16
L21
L22
J703
J1002
J1003
J1004
F4
F5
8.9 USB Port Test Error (1)
An error occurs when a USB I/O device is installed.
USB Test Error
Check if the USB device is installed
properly.
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