So I received this G5 from a relative who knows I like to tinker with PCs. Since it's a Mac, I'm pretty lost. I'd like to learn though, and I figure this just may be the place to do it. System Spec tag inside cover says: PMG5/DP2.7/PCI-X/1GB/250GB/SUPER/R9650/56K/BTAP/KEY/FCE HD Issue is that the system won't boot. *Most* of the time I hear the chime after I press the power button. The HDD is new... and blank. The memory tests good in another system. Unsure what speed the video card is ( Is some type of AGP - 4x/8x?? Guessing that's the "/R9650" for a Radeon graphics card? It's got 2 DVI ports on the graphics card, and I have an adapter to change that to analog VGA) When I lay it on its side, keeping the clear plastic piece installed inside the case, and press the power button, I hear the chime. I keep looking inside the case and see a solid red led on the motherboard. From the side I can't see it directly, like it's underneath the liquid cooling radiator towards the front of the case. I'm guessing that has to do with one of the CPUs? After a couple minutes, the internal fans kick on full speed and do not stop until I power the system off. Thanks in Adv. for any help !