I have a G4 733 Gigabit Graphite tower. It was running fine then I Got iLife. It is not the problem. The DVD ROM quit reading DVDs so I ripped the Combo Drive out of an emac that died on me and put it in the the tower. While I was in the emac I saw the RAM and took it to put in the G4 Tower. It booted right up. The system profiler said the RAM was OK and the Drive was recognized. A bit later I kind stumbled with the mighty mouse. I kind quadruple clicked and hit the scroll wheel all at the same time. Kernel Panic. I restarted and ran the " fsck -y" routine in the command line. It found an error and said it fixed it then ran again and said everything was OK. So I typed reboot and nothing happened. SO I turned off the power, put in a Tiger disk then rebooted from the disk. I ran disk utility again and the pemissions repair. Made a place to copy my system to a larger partition so I could install iLife. Then after I rebooted everything went wrong. It booted fine but when i opened Safari to get a copy of carbon copy cloner the system froze. So I powered down the tower. opened it up and took the RAM that I just put in closed the case and wha-la it chimed but there was nothing . No signal to the monitor. no clicky sounds that indicate the computer is working. This is where I am now. What can I do now to trouble shoot this problem.