I just finished heavily upgrading my iMac 350 to the following: Seagate 120GB Ultra ATA hard drive 1GB PC100 RAM Slot-loading DVD-ROM drive Now when I turn the iMac on, I don't see any video or hear the chime sound. And yes I updated the firmware before upgrading because I know that's required when installing OS X. Any help is appreciated. Thanks! Edit: I found out it was the memory I purchased for it. The iMac boots fine with the original RAM so I'm guessing it cannot read ECC sticks correctly. Is this right?