I have an imac g3. I allowed it to do a software update. It needed to be restarted but I told it to shutdown. I was thinking about going ahead and upgrading the memory. I took the plastic cover off and looked at. I touched nothing. Realized I forgot to back things up first so I put the cover back on and now it won't start. I don't mean it fails to boot I mean it acts like it doesn't have power. I push the button and nothing. Nothing I did could have caused this and I doubt a software update could do it either. Any suggestions? I have 0 experience with macs but I don't find any other buttons anywhere.