MSoft,
I don't know if this will help but you can try this if you have not already tried it.
1. Turn off the power totally- unplug from wall too.
2. Unplug the power supply from the keyboard.
3. Let it set for about 5 minutes
4. Re-connect the power cord to the SD7 and the wall
5. Turn on the power again

With some luck it might reboot for you.

Deane