Answer to: iMac wont boot up, just the apple screen shows. Can anyone help?Hi I had a much worse problem a few days back. My MacBook bought in early 2007 would not power on at all. I took it to the apple repairs. They said it was a faulty logic board. It costs approx $1000 to replace this they said, so I ended up getting a new one. I would try to boot up with the installer cd's that came with it first to see if the problem can be fixed since it's still turning on. If this doesn't work, get it checked out before it gets any worse.