Chad wrote:
Lately I’ve been receiving the following warning message on my 720.  Any idea what’s going on and how to resolve?  I have the latest update installed.
DHCP was unable to obtain an IP address... etc. etc
 
That would inidicate a possible issue connecting to your adsb device, and a possible issue with the wifi settings in general.  I suggest you flash the firmware on your 720 - here are the instructions:  https://www.iflygps.com/OSUpdate
After flashing you will need to reconnect to your ADSB device again.
-Walter