HB 899 issue

My HB 899 hd si di unit started giving a "low voltage" message. My HB 859 hooked to the same battery was working fine. The the 899 started giving me a "depth Alarm" Message even if I was in 10 feet of water and the depth alarm was set on 3 feet. I also noticed that I was not seeing brush piles on it that I knew was there and could confirm on the 859 DI unit.

So, I did a "restore System Defaults" . Now I am getting screens that I have never seen before i.e. double split screen navigation showing the same thing, a full screen navigation- that I have never seen before,a down image screen that does not move, a half DI and Half SI that does not move.etc. I can't hit the "view" button and get a straight DI screen or SI full screen... I get about 4 screens that are RTS variations from split, to full, to 3 different looks on the same screen...

Any idea what may have happened and how to fix it? I have done an update as of today and it still is the same. I did not remove my lake maps card before I did the "system defaults restore"

Thanks for any help.