Usb Failure - Acer Aspire 7739 Service Manual

USB Failure

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If the USB fails, perform the following, one at a time. Do not replace a non-defective FRU:
S t a r t
C h e c k U S B b o a r d t o R e - a s s e m b le U S B
N o
M B c a b le b o a r d c a b le t o M B
S w a p U S B b o a r d
C h e c k U S B b o a r d ? N o
a n d U S B c a b le
R e p la c e M / B
Figure 4-8. USB Failure.
Can not support USB3.0
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Troubleshooting