I'm looking to purchase a 98ES from the dealership I work for. They are going to let me demo it for a couple days so I can have my mechanic check it out. I've noticed that both of my rear doors will not open (inside or out). Door locks appear to be in the unlocked position. Problem #2 The Cassette deck does not work. I've tried to hit the power button and it will not come on but, when you turn the headlights on, all the buttons on the radio are illuminated but, the display is not lit up and there is no sound coming through the speakers. I noticed there is a silver amp under the passenger side front seat. Could it be bad causing my stereo not to work? Any advice or insight would be greatly appreciated.