Need to know the following:
1. What exact Mac model do you have?
2. What exact Mac OS are you running?
3. When you say "erased the hard disks", is that the internal drive? If that's the case, how are you making posts here?
4. When you say "I can install the OS from the installation disks", which ones are those, ie, DVDs, and which Mac OS?
It's a Mac mini, ID is macmini4,1.
It's the original Snow Leopard Server software (10.6) on the GREY disks.
I'm able to post because I've got a Mac Pro and a Black MacBook as well.
I'm able to INSTALL the server software, but when it gets to the setup screen there's a little bicycle wheel spinning in the lower left corner of the window, and the buttons are 'greyed' out. I left it like that for 2 hours, but nothing changed. It has 2 internal hard disks, and I used Disk Utility to erase, then to repair, them. During the install it allowed me to choose which disk, then it took about 35 minutes to install the software.
After I did this 3 or 4 times, I connected it as a Firewire disk, and had a look, the software looked OK. The disks have been set up with Disk Utility, the original DVDs used for the installation, so I don't know where to go from here.