I'm trying to build a new computer, and have built a few before. I've got an Aspire Xinfinity case, with BK 420W power supply, Asus P5RD1-V motherboard (has onboard ATI Express 200 video), 2x512 Corsair PC3200, 3 Ghz Intel P4 LGA775, dvd drive, cd-rw drive, and an 80Gb WD800JD SATA HD. Put it all together and all fans spin and everything powers up, but nothing will show up on the monitor screen and no beeps at all from the internal speaker. I noticed also that the CD drives will not open, but the lights on them are flashing. So I have tried running bare minimum (no drives, one stick of RAM, and nothing in PCI slots), no change. Then I changed the power supply to an Antec 350SL, no change. Reset the CMOS, no change. Tried all different combinations of things hooked up, no change. No matter what I do, the fans will power up but nothing ever appears on the screen and no beeps. I guess that would narrow it down to the motherboard or the processor. Any ideas what might be going on here? Thanks.