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