I recently bought a 2004 1.8ghz iMac 20" for a very good price. It came without an operating system and only 256 mb ram. When it arrived I installed 2x1gb sticks of pc 3200 ram and upgraded the hard drive to 400gb, which was a really easy job. I tried installing leopard on the machine but it just kept spitting out the disc. I then tried installing tiger and this went very smoothly and the machine runs very nicely. I have tried other discs, such as iwork and iLife, in the machine but it doesn't like any that I try, just spits them out.

Has anyone had a similar problem? I am resigned to replacing the drive but first wondered if there may be another problem....