Hi! I'm new to Mac computers. I just recently purchased a Apple iMac 20in 2.16GHz core 2 duo 4gb RAM. It worked great for the first couple weeks. Now I'm unable to power it on at all. I purchased a new power cord, hoping maybe that was the problem. It didnt change anything so I took it in to MacPro's and they told me it was a bad power supply but were unable to order the part since its an older computer (late 2006). I'm wondering if someone could tell me what part I would need to fix it and if that's really true that I wouldn't be able to find a part to fix it. Thanks much!