Amir, Another thought, try removing all but one of your memory modules. If that doesn't help try removing that memory module and install another module in another slot. As it could be a memory module or the slot that a good memory module is installed. Another question that you may have already answered is "When you do a reboot" do you get the "quick and dirty memory test" chime. It's the chime that you should hear at boot time. Cheers Harry San Jose, Ca ("`-''-/").___ ..- -''"`.. _ ( 6_ 6 ) `-. ( ``-._.-`) (_Y_.)' ._ ) `._ `.'``-..-' ` `_..`--'_..-_/ /--'_.' ,' ((((,-'' ((((,' (((.-' fl On Feb 23, 2012, at 1:46 PM, Amir 'CG' Caspi wrote: > Hi Harry, > > Yes, one of the very first things I tried was resetting PRAM and > NVRAM, including pressing the CUDA button. It's possible that such > a reset might be the cause of the failure to boot, per John's > previous email... I'll try to reinstall the firmware upgrade (if I > can find it) and see if that fixes things. > > Thanks. > --- Amir > > On Thu, 23 Feb 2012, Harry A. Freeman wrote: > >> Greetings, >> >> Have you reset PRAM and NVRAM. Also removeing the PRAM battery for >> 5 minutes and then depressing the PMU (CUDA) button. The PMU button >> is usually next to the PRAM battery. >> >> Cheers >> >> Harry >> San Jose, Ca > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4