My 2002 Quicksilver has been working perfectly since I picked it up last October or so. Best PPC machine I've ever had the fun of toying with. However, tonight I reached around the back of the tower to insert a USB drive (PCI card with 2.0 ports. USB 1.1? Ain't nobody got time for that...). I was copying Mac OS 9.2.2 so I could install it onto an iBook G3 to play Railroad Tycoon 2 in fact. But I order to to get back there, I lifted up the back handle gently while the Mac was running (this was probably my mistake?) and all of a sudden a new very loud grinding noise bellowed out of the system. Fearing the worst I unplugged it straight away and bit my lip. I let it cool before opening it up for inspection. I found at first a bit of IDE cable plastic poking into a PSU fan. I though that must be it, tucked it in, and booted up. GRRRRRRRRR!!!!. OMG. Make it stop. Make it stop. For the love of all the earth. Make it stop. I inspected it a second time, and discovered that the large fan below the PSU toward the back, was both too far up against the outer side of it's cage, and cracked slightly down a part of one blade. I pushed it back into it's proper place and booted up again. All things bright and beautiful...for about half and hour. I opened it up yet again to find that the fan had moved back to being right up against the cage side, scratching up against it as it rotates. i.e. not where it should be. I have taken it out of service until this problem is resolved. Don't want to cause any further damage. What do I do here? Can I fix it? Is that fan easily replaceable?