i got a this from a friend and hooked it up im my 1994 3000gt and it worked for one day. then i drove the car down the road and it stopped! now the only button that works is the power button and nothing else. i can turn it on and the radio works but nothing else. i took it to circuit city and had them look at it and they told me that i would have to send to to eclipse and that will cost $400 i already have $800 in it and i would love a quick fix if there is one. please help!!