Harry Freeman wrote: > Greetings Tony, ( + )!( + ) > > If you are just interested in finding out if the Power Supply is > working and that power is getting to the mother board, then just turn > the platform on and let it run for about an hour, then start touching > the top of the IC's and if they are warm to hot the PS is putting out > voltage to the MB. > > The "Bong" that a Mac makes when starting-up is an indication that the > processor has tested installed memory and it has passed the test. The > memory modules that you have DDR 184 pin PC3200 should work but they > may not be the fastest that your machine can handle. PC 3200 is the fastest for your box My references follow Mactracker says pc3200 184 pin for the 4 ram slot boxes note: Early 2005 4 slots (dual 2.0 GHz), or 8 slots- PC-3200 (dual 2.3 GHz+) 2.5v, unbuffered, 8-byte, nonparity 184-pin DDR SDRAM (matched pairs) Late 2005 2.0, 2.3, or dual 2.5 GHz 8 - 240-pin PC2-4200 (533MHz) DDR2 ECC or NECC SDRAM (matched pairs) snip rest-------------- Also is the pram battery present, does it have a charge?