I thought that might be the case but the processor card snaps in tightly and I have tried reseating it a number of times. The G4 boots up and runs as normal as soon as I replace the 800 with the OEM 466. David On Saturday, December 7, 2002, at 06:54 PM, Tracker at aol.com wrote: > > In a message dated 12/7/02 1:37:11 PM, denstene at mac.com writes: > > << but if I put the 800 in I get no chime and nothing on the screen. > >> > > That condition indicates to me that the card wasn't seated fully in > the slot. > Check carefully that the processor card is FULLY seated before trying > to boot. > > If it still doesn't at least make some kind of noise at power up, you > may > have a dead card. Even if the processor chip had quit on you, the > machine > should have made some noise even if only the discordant glass > crash/screeching brakes/raspberry/clink-clank-bong of a bad RAM check.