Ricoh SP C250DN Operating Instructions Manual - Page 31
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If USB Connection Fails
This section describes how to troubleshoot a problem related to USB connections.
Problem
The machine is not
automatically recognized.
Windows has already
configured the USB settings.
The machine does not
recognize the USB
connection even when a
USB cable is inserted.
Causes
The USB cable is not
connected properly.
Check whether the computer
has identified the machine as
an unsupported device.
If the USB cable is
connected while the
machine is off, the machine
might not recognize the USB
connection.
If USB Connection Fails
Solutions
Disconnect the USB cable from the
computer, and then turn off the main
power switch. Turn on the main power
switch again. When the machine has
fully booted up, reconnect the USB
cable.
Open Windows' Device Manager,
and then, under [Universal Serial Bus
controllers], remove any conflicting
devices. Conflicting devices have a [!]
or [?] icon by them. Take care not to
accidentally remove required devices.
For details, see Windows Help.
Press the operation switch, and then
disconnect the USB cable from the
computer. When the machine has
returned to the ready condition,
reconnect the USB cable.
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