1994 Mustang TV

My buddy installed a mobile tv in his 1994 mustang gt... i usually do all the installs, but anywayz when ever he turns the car off the unit acts as if it is the first time it has been turned on, like the memory wire is not connected? I just looked over the wires really fast today  and it seems like everything is all connected? Any ideas on what it could be, he is gonna drop his car off to me this weekend so i can work on it,  the only thing i could think of is if his clips are bad, because he took out his old headunit right before he installed the tv and the headunit never had any memory problems, please help me out!! thanks for the help in advance

I Checked The Memory Wire And Used A Tester, I tested it from the clip to where it plugs into the brain, i even tried by passing the memory wire and goin straight to a battery, and still i got the same results? the only other thing i could think of is if the brain is bad, or th wire running from the brain to the monitor is bad??? any ideas???? the headunit he had in before the tv worked fine with the memory, So i think it is the unit any way to test? its a pyle PLDINTV7?? Get Back To Me And Thanks For Your Help!