Rundown:

I installed the Ultrex, updated software in both units, installed Ethernet port and everything ran flawlessly all summer.

Recently went to lake, cranking battery was totally dead. Replaced cranking battery. Back to lake. Go to turn on console graph (998 si) and the screen wont go past the Humminbird logo screen. Then I try and turn on the trolling motor graph (858di) and it is stuck on the GPS screen.

Assumed it was a power issue, check voltage at new battery, fuse box, and at both power cords and it is 12.4 volts. Took both units to BP and had them try to power them from a different power source and same results on both graphs.