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Chapter4 Trouble Shooting - Acer ALW-3016 User Manual

Acer 16-port 10 / 100 mbps switch user's guide alw-3016
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4. Trouble shooting
All LEDs are off.
Fan Err. LED is
blinking or down
LNK LED of a
connected port
is off.
100 LED is not lit
when connected
to a 100 NIC or
100Hub (but LNK
LED is lit.)
User's Manual
Possible Reason
The hub is not receiving
DC power.
The fan is dead or work
1.The UTP cable is not
securely connected
2.The port is bad
3.If the other party is a PC,
the Network Interface
Card (NIC) could be not
4.If the other party is
a hub or LAN switch,
the connected ports signal
could be cross-over
5.The UTP cable is broken,
or it is cross-overed cable.
The auto-negotiation
function is failed between
ALW-3016 and the other
1. Check if the power adapter
plug is securely fastened into the
AC outlet.
2. Contact you vender if still
1. Check your fan, maybe you
should have a new fan.
2. Contact the vender
1. Check the cable connection
2. Try to connect another port
3. Check if the network interface
card (NIC) were installed
4. Make sure ALW-3016 normal
port is connected to the other
hub's (or switch's) uplink port,
and ALW-3016 uplink port is
connected the other's normal port.
5. Try another normal cable.
1. Check if you force the connection
equipment in specific mode.
If, yes, then free it to auto-negotiation
2. Un-plug the UTP cable from
ALW-3016 and plug-in again.
3. Check if the NIC is setted to
auto-negotiation mode.
4. Check if the other hub is set
to auto-negotiation mode
5. If the above steps does not
work, it is an interoperability
problem, contact your vender.


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