HELP...messed with head unit now car wont start

i was hooking up a secons set of subs.......running the remote turn on wire to my head unit....since i already have a remote turn on wire hooked up in there my friend told me to put it in the "acc" spot..........i pulled out the whole unit with all the wires that go in the back of the HU to hook up the remote turn on wire and i noticed when i put it back the headunit wont even turn on.......and on top of all of that my car dosnt start just makes this hummng noise.........

What happend!?!?!?!?!?

that sounds bad. Check to see if u grounded ur remote wire and hooked it to acc wire

is the headunit factory or aftermarket ?