I bought a Mac Mini refurbished from Apple last October. My specs are: 1.66 Core Duo 2GB Memory 100GB 7200RPM Combo Drive Leopard When first got my Mini I took it apart to upgrade to 2GB of memory and a 100GB 7200RPM drive. It went well except for one of the memory sticks wasn't showing up for some reason. I decided to let it go cause I didn't really want to take it apart again and every thing seemed to be working well enough otherwise. I had some free time today (I know, idle hands are the Devil's work), so I thought I'd take it apart again to if I could get both sticks of memory to register. Why pay for it and not use it? It didn't go as well this time. The disassembly part went fine which it usually does the second time. It looked like the top stick wasn't in all the way. I re-seated both sticks. and put it back together. I plugged it in and turned it on but got no video signal. The fan was running very loudly, which it has never done before. It was the only thing telling me it was on. I didn't put it back together completely since I wanted quick access if for some reason it didn't work out. I again re-seated the memory, but got the same result. So then I tried one stick at a time. One time I tried it, I did get video, but it was some kind of folder with a error sign on it. I noticed that the WiFi had become disconnected. After I reconnected it, it went ack to the same result, a loud fan and no video. So that's where I'm stuck, a loud fan with no video. I'm not as up on my Macs in general so I'm not sure what this means. I could try the memory in my laptop just to see if it's working. If anyone has a suggestion as to what my next step should be or what the cause of this is, it would be greatly appreciated. Thanks for looking.