I was given a performa 550 few years ago. When i try to turn it on all i get a a gargle chime then nothing else happens. I clean all the connections. I look online for the motherboard diagram and can't find nothing on this model. All the chip on the board getting power. I pulled the board out after i left it on for 5 minutes and all the chips was warm. When turn on the hard drive spins up and then stops. I check the caps and they look good. Some of the caps look like they was replaced. If anybody has a idea what to try and know where to get a diagram of the motherboard. The power supply is built into the tv board on top. thanks for the help.