[Elecraft] Need Help With The K!

[Paul Gates, KD3JF]

I used the K1 last night  and everything worked fine, but when I got up early this morning, I could not get it on 40 meters. The dial reading for example is 3580. All the other bands work good like 30,20,17 meters. I probably goofed it up myself rather than little gremlins attacking it while was sleeping. I was playing around with "B1-4."
 
The other help I need is how to disable the internal tuner. I have read the tuner manual but cannot get from ATU to TUN. Any help I can receive would be greatly appreciated.
 
Paul Gates, KD3JF
Elecraft Kits:
K1 #0231
KX1 #1186
XG1: Signal Generator