Hey Guys, Just installed a new graphics card into my powermac G4 agp slot (Nvidia GF 6200 256MB DDR2 AGP Graphics Card came from another working powermac) When i then turned the mac on it made the bong noise and started booting into osx and then went to a page saying please restart mac. Everytime it boots it brings up this messsage. So i took the card out and tried putting in the old card to try that. same thing happened. So i reverted back to the new card and now the mac makes the bong noise and the screen does not come on and my monitor just said no input.... any clues??