IMac won't boot after transferring info to laptop (Target disk mode)

Hello Mac Gods,
I have an iMac, and it was running great until I started it up in target disk mode to transfer info to my new laptop. Now it won't start up, and when I started it up from the install DVD to repair the disk, the hard drive didn't appear at all (and couldn't be repaired). Any advice? It seems like it must be the result of the target disk startup - the timing is too perfect and I didn't have any problems before.
Any input would be much appreciated.

Hopefully you have AppleCare. If so, call Apple to see if this if you are afflicted with the dreaded motherboard problem.
BTW, this area is for discussing iMac G4s. Since you have an iMac G5 you will probably want to make future posts in the iMac G5 discussion area.

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