OK, I hope that you guys can help me. Here is what I have done. My mom had asked me to upgrade her Powerbook G3 (Pismo). She is getting into digital photos, etc and the machine was just not cutting it. So I added to 512 mb sticks of memory from OWC. I then swapped the original 6 gig hard drive for a 80 gig 5400 IBM hard drive. After completion of this service, I tried to restart the computer while holding down the C key and nothing would happen. It was just dead. Though the caps lock key would light up, but that was it. I tried zapping the PRAM, but it would not respond to that. I tried resetting the PMU, and that didn't help. So I took it back apart and reinstalled all the old hardware, still no go. Any ideas on what I have done to mess this up, and is it possible for me to fix it? Or is it dead ? Any help you guys can give me would be great.