Try booting with holding down C (if I remember correctly) - the idea it will try and boot the hardware test system (and let you eject the CD so that you can install the OS boot CD).
Whilst I doubt it a hardware test, it would be a good idea to test it all. Might also be wise to reset PRAM.
Whilst I doubt it a hardware test, it would be a good idea to test it all. Might also be wise to reset PRAM.