pkg m780 hooked up correctly?

okay i have these two alpine monitors recieving no video. I know it not the head unit because i hooked up a second source and its getting video to the second source. The alpine headrest monitors (pkg-m780) just display a blue screen. This is how I have them hooked up and let me know if there is something wrong with it. ACC-hooked up to power up when vehicle starts. Parking Brake Lead- Hooked to ground (i know its ground to because originally had it to power and it would say that the parking brake needs to be set, so now its to ground and displaying a blue screen). Remote Control Output lead-Not hooked up to anything. Ground Lead- Not hooked up to anything. Is there something I am missing, any help would be greatly appreciated thankyou

Have you tried connecting the ground wire?  I am not sure about the Alpine monitors, but some of the stuff out there has to see the parking brake not engaged at power up, then you apply the brake. 

oops im sorry, the ground is connected to ground, my bad

and parking brake wire i had grounded that

Have you tried ungrounding the parking brake wire, Then powering up the monitor, And then Regrounding the brake wire?
Some of these units will not work if they are grounded at power up.

I just went out to try that and it didnt work, im still getting the blue screen