go to Utube and type in ,,(How to install a SonyCDX-GT42ou car stereo ) take a look at that , when you say when you move the radio around it was going on and off? check that the wires that are going to the harness from the car are all tight and that the fuse that powers up the radio is ok, and has not blown" check at the back of the radio , were the harness plugs in for the black 15 amp fuse, and make sure that its ok, if you cant find it there check your main fuse box , for the radio fuse, you can also email the maker of the Utube clip" for help,,
m, August 2012