Roland V-Synth owner manual Deleting Incorrect Device Information, 147

Troubleshooting

Problem	Cause	Action
An “Unknown driver found”	It is possible that the computer has detected the V-	As described in “Deleting Incorrect Device Informa-
dialog box appears, and you	Synth incorrectly.	tion” (p. 147), delete the incorrect device information,
are unable to install the driver		then re-install the driver.
Device Manager shows “?”,
“!”, or “USB Composite De-
vice”
Driver is not installed correct-
ly
Can’t install/delete/use the	Did you log on to Windows as a user with administra-	In order to install/delete/re-install the driver in Win-
driver in Windows XP/2000	tive privileges?	dows XP/2000, you must be logged into Windows as a
		user with administrative privileges, such as Adminis-
		trator. For details, please contact the system adminis-
		trator for your computer system.
	Did you make “Driver Signing Options”?	In order to install/re-install the driver, you must make
		“Driver Signing Options.”
Windows XP/2000 displays a	Did you make “Driver Signing Options”?	In order to install/re-install the driver, you must make
“Hardware Installation” or		the settings described in “Driver Signing Options.”
“Digital Signature Not Found”
dialog box

Deleting Incorrect Device Information

Use the following procedure to re-install the driver.

1.Turn off the power of your computer, and start up Windows with all USB cables disconnected (except for keyboard and mouse).

2.After Windows restarts, use a USB cable to connect the V-Synth to your computer.

3.Turn on the power of V-Synth.

4.Click the Windows Start button, and from the menu that appears, choose Settings Control Panel.

5.Double-click the System icon. The System Properties dialog box will appear.

6.Click the Device Manager tab.

In Windows XP, select the System Properties Hardware tab, and click Device Manager.

7.Check whether “Roland V-Synth” with an “!” or “?” symbol is displayed below “Other Devices,” “Sound, Video, and Game Controllers,” or “Universal Serial Bus Controller.” If you find any such indication, select it and click [Delete].

8.A dialog box will ask you to confirm deletion of the device. Verify the contents of the dialog box, and then click [OK]. In the same way, delete all occurrences of “Roland V-Synth” that have an “!” or “?” symbol.

9.Check whether “Composite USB Device,” “USB Device,” or “USB Composite Device” with an “!” or “?” symbol is displayed below “Other Devices,” “Sound, Video, and Game Controllers,” or “Universal Serial Bus Controller.” If you find any such indication, you need to determine whether it has appeared because the V- Synth has been detected incorrectly, or because there is a problem with some other device. To determine this, switch off the power of the V-Synth.

*If the “Composite USB Device” (or other) indication disappears when you turn off the power of the V-Synth, then it is the V- Synth that has been incorrectly detected. Return to step 2 and continue the procedure, and when you reach step 8, delete the information that was detected incorrectly. If the indication does not disappear when you turn off the power of the V-Synth, then this indication refers to a different device. Do not delete it.

“Composite USB Device,” “USB Device,” or “USB Compatible Device” may sometimes indicate a device other than the V- Synth. Be careful not to accidentally delete the registration for another device. If you delete the registration for another device, you will have to reinstall the driver for that device.

Appendices

147