Pi was not shut off by unplugging or any such thing. I was actually using the Cayenne app when it happened. I was trying to find out why the processor was always at 100 % so I was switching off some options -such as I2C, Serial etc and when I went to save the configuration the Pi went offline. I went to the Pi and it was off and would not restart. I thought it was the Pi so I swapped it out with the same results, it wouldn't do a darn thing. Swapped the SD and it booted right up. Swapped back to original Pi, tried the SD again and same problem. So I proceeded to build a new Boot SD, booted the pi and reinstalled the cayenne software etc
Anyway, the response to my problem that gave a link to check why the Pi is showing Offline gave me the answer to the problem of getting back up and running with Cayenne.... I built a boot with Jessie lite. DANG! I thought maybe that would reduce the overhead and lower the processor utilization. Oh Well. Back to reimaging and rebuilding.
Thanks for the help. (however, I still contend that Cayenne corrupted the SD card somehow.