Power Mac Wint Power Up



i had tested the power supply and it tested good. what is the next thing to check if i eleminated that.
thank you
It depends on what the symptoms are. Will the system begin to start at all? What is the exact problem?

Could be a motherboard battery. Could be a bad connection between the motherboard and power supply. Could be that the computer is simply unplugged. Could be anything, but you were extremely vague in your question, so we can only offer equally vague answers. Please be more specific.