vs calais eurovox headunit/10 stacker cd player. help!

[Tyson_walker]

hey guys, in my recently bought vs calais is the stock eurovox headunit with 10 stacker cd player, when i got the car the battery was disconnected and so i had to enter the security code, i entered 111111 which is apparently a commonly used code, and it worked, the headunit seems to work as intended except the screen constantly flashes and every now cuts out and asks me to enter the code again, im not sure if im meant to set something or do something after the code is entered, any suggestions would be greatly appreciated.
tyson

[tt460]

sounds like it is loosing power im guessing that it has had a aftermarket stereo in it at some time and you have a bad connection, look in the how to section for instructions on removing the stereo and check the connections