Roland UM-4 Owner's Manual page 43

Case 3: Cannot shift to Suspend (*)
Is an application which uses the UM-4 running?
Exit the application which is using the UM-4.
The computer cannot shift to Suspend mode if an application such as a sequencer is using the
UM-4.
What is Suspend?
This is a function which minimizes power consumption by shutting down the internal
circuitry of the computer and the peripheral devices while the power remains supplied
to the computer.
Case 4: UM-4 does not resume correctly from the suspended state
When suspended, was the UM-4 still connected via the USB cable?
Disconnect the USB cable, and then re-connect it.
On some computers when Windows resumes from the suspended state, the UM-4 may fail to
resume. If this occurs, the USB cable connected to the UM-4 should be disconnected and then
reconnected.
Case 5: Windows hangs up (freezes) when returning from the
suspended state
Disconnect the UM-4's USB cable before suspending.
On some computers when Windows resumes from the suspended state, it may hang up
(freeze). If this occurs, the USB cable connected to the UM-4 should be disconnected before
suspending.
If the computer itself has a suspend switch, the USB cable connected to the UM-4
should be disconnected before you press that switch.
For a notebook computer, some settings of the computer may cause it to
automatically enter suspend mode when the lid (LCD display) is closed, so the
USB cable connected to the UM-4 should be disconnected before the lid is closed.
When you once again wish to use the UM-4, make sure that the computer has resumed
correctly from the suspend state, and then connect the USB cable to the UM-4.
Case 6: No sound
Are the USB cable, MIDI cables and audio cables connected correctly?
Refer to" Connections" (P.11), and connect the cables correctly.
Are the volume controls of your sound module, audio system, and application raised?
Check each of the volume controls.
Are the sound module settings correct?
Set the Computer switch of your sound module to the "MIDI" position.
Before changing the setting of the computer switch of your MIDI sound module
(SC-88Pro etc.), be sure to turn off the power.
Troubleshooting
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