Can not connect to network
Can not connect to
network
Yes
Check
weather
the
twisted
pair
has
connect to Internet
Yes
Check if the LAN socket
(P1) and U12 is broken
Yes
Check if the soldering and
components
around
and U2 are abnormal
Yes
Replace the main board
4-6
No
No
No
P1
Trouble shooting chart
Connect
the
twisted
Internet
Fix or replace P1 and U12
Fix the abnormal
components or soldering
pair
to