No ignition or accessory function when getting in car

[Paramedic Terry]

Yesterday, I pulled my 2013 SHO into the garage and opened the front windows and sunroof so I could listen to my phone through Sync. When I was finished, I went to shut off the accessory mode. The car is still new to me, and I'm not sure if you're able to do this, or if it just has to time out. I fiddled with pressing the start button several times to cycle between ignition and accessory. When I figured out that I couldn't "shut off" the accessory, I just left it alone.
Today, when I went to get in and drive the car, the dash illuminated when the door opened, but didn't display the "press brake pedal to start" box on the dash as usual. I can't put in accessory mode either. The "start" button won't do anything.
I suspected the fob, but doors lock and unlock and trunk also unlocks. I tried remote start function and that doesn't work. Also the "panic button" function on the fob wont make the horn blow on & off. A fresh fob battery didn't change anything.
I unhooked the negative battery cable for a couple hours and that did nothing to help. The Sync did go through a self-check and displayed the screen for a while.
I've searched through all the threads but haven't found a similar issue with anybody else. DOES ANYONE HAVE ANY IDEAS? PLEASE HELP!

 

[Majestic]

I'd say your battery is done.

 

[Paramedic Terry]

Battery is brand new premium from Auto Zone. I checked the voltage @12.6 after it sat 24 hrs and accessory mode running to power the radio.

 

[Majestic]

Is it in park?

 

[Paramedic Terry]

Checked, and it's in park.
I'm trying to figure out my next move. I'm wondering if a burnt fuse may be the culprit. If so, where do I start?

 

[SM105K]

Checked, and it's in park.
I'm trying to figure out my next move. I'm wondering if a burnt fuse may be the culprit. If so, where do I start?

I know you said the battery is new, but it is acting like a bad battery.

 

[Majestic]

I know you said the battery is new, but it is acting like a bad battery.

I'd definitely start there. If you have access to another battery, give it a try.

 

[Paramedic Terry]

Thanks for the input. I'll go the battery route and see if it works.