Roland Edirol UA-25 Owner's Manual page 53

Is there enough free space on your hard disk?
Delete unneeded files to increase the amount of free space.
After deleting the file(s), empty the recycling bin.
Is the USB connector enabled on your computer?
Refer to the owner's manual for your computer, and verify that the USB connector of
your computer is enabled. The driver cannot be installed unless the USB connector is
enabled.
Does your computer or USB hub have a sufficient power supply?
If you are using bus power, the UA-25 cannot be connected if insufficient power is being
supplied to it.
Check whether the following cases might apply.
• If you are using a notebook computer running on its battery, operation may be
unstable with some computers. If this is the case, connect your computer to its
AC adaptor.
• The power conservation mode of your computer may be limiting the power it
supplies to the USB connector. Re-examine the settings of your computer.
• The UA-25 cannot be used with some bus-powered hubs (hubs that do not
have their own power supply). Use a self-powered hub (a hub that has its own
power supply).
Does your computer meet the USB specification?
Operation may be unstable if you are using a computer that does not electrically meet
the USB specification. If so, you may be able to solve the problem by connecting a USB
hub that has its own power supply.
Troubleshooting
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