I've seen this with my phone before, and with printers before.
If you haven't rebooted your computer, try that first.
With the computer turned back on, connect the Kemper, and then turn the Kemper on.
--
If you already have done the above, try connecting to a different USB port on your computer (if you have more than one).
Display MoreI've seen this with my phone before, and with printers before.
If you haven't rebooted your computer, try that first.
With the computer turned back on, connect the Kemper, and then turn the Kemper on.
--
If you already have done the above, try connecting to a different USB port on your computer (if you have more than one).
I tried all USB ports in my computer, I rebooted computer few times since then.
Now it seems more fault of Kemper. I tried to update latest beta 2.7.3 to latest firmware 2.7.3, and it was not possible
[Blocked Image: http://s24.postimg.org/42veriaqd/aaa.jpg]
Then I tried to format USB stick which I always use with Kemper and it was also unsuccessful:
[Blocked Image: http://s9.postimg.org/v2crudnwf/bbb.jpg]
Have you tried another usb stick?
Have you tried a different and checked cable?
Also, have you been able at all to use RM after upgrading to 2.7.3 beta?
http://www.kemper-amps.com/for…postID=179098&#post179098
EDIT: just seen you posted there as well 
Pretty sure this is a problem on the computer with drivers or host controller and not the Kemper.
Pretty sure this is a problem on the computer with drivers or host controller and not the Kemper.
that's my impression as well.
gs
Have you tried a different and checked cable?
I tried this cable with printer and printer is recognized by computer. I could scan a page. So the cable is fine.
One thing to make sure of on the Kemper for connections to the computer do not use the USB type A socket (flat memory stick style) make sure you use the type B port on Kemper (more square style). Also make sure when you use the type B port that nothing is inserted in the type A port - only use one port at a time. The same goes for using the memory stick - unplug the computer from the type B port when using a memory stick in the type A port. If you google USB port types you can see diagrams of type A vs. type B if my descriptions are not clear.
I do... Win 7 here
Now upgraded from 2.5.0 to 2.7.3 - driver seems OK, but still no connection to RM on USB A-B cable - I removed A-A usb cable for firmware upgrading. Anyway do you have Kemper in "Sound, video and multimedia controllers" in Windows device manager?
I'm on Win 8.1 and I have it listed in device manager as you indicate. Also the version info (under properties/driver) is: 0.8.4.58.
I still think this is something on the connecting system rather than the Kemper itself. The supporting data for this is that the Kemper is properly accessing memory sticks and that uses the same USB interface albeit with a different connector.Unless the physical connector is damaged on the Kemper I would think something else on the host system is interfering with proper operation. Try and make sure nothing else is connected to the host systems usb ports while debugging and verify the driver version.
