User`s guide
82 Chapter 05: Troubleshooting
USB Problems/Solutions
Problem Possible Cause Solution
An external device
does not work when
it is connected to one
of the USB ports.
The external device is
not receiving power.
Make sure that the external device is
plugged into an electrical outlet.
The external device is
defective.
Try connecting the external device to
another computer to determine if it
operates properly.
Windows is not rec-
ognizing the device
properly.
Disconnect the device, power it o, re-
connect the device and then turn it on.
Disconnect the device, power it o,
power it back on and then plug it back
into the computer.
Try the above two solutions, but plug
the device back into the other USB port.
Disconnect the device and power it o.
Shut o the eo a7400 normally. Power
on the device and plug it in. Power on
the eo a7400.
Contacting Your Dealer
If you still have a problem, the next step is to contact the dealer
where you purchased your eo a7400.
Your dealer can determine if the problem will require that the
computer be taken to a service center for repair. Before you call
your dealer, please have the following information available:
1. Which model do you have?
2. What is the serial number?
3. How is your computer congured? What peripheral devices
are you using?
4. What messages, if any, appear on the screen?
5. What software were you running at the time of the problem?
6. What have you done already to try to solve the problem?
If you have overlooked a step, your dealer may be able to
solve the problem over the phone.