Ah....I've got an XT983. I haven't been able to get the thing to even work. It looks like it is about the same thing. The only differences that I notice are the processor (mine came w/ a 1.4ghz Athlon Thunderbird), OS (mine had XP Home), and yours had a DVD-ROM.
I mean the mobo is the same. That mobo is made by Trigem. It's a SantaFe KL133. Emachines also uses another modified version of them so that tells you that it is cheap.
I bet that CD burner is black and the tray of it has very sharp corners. If that's the case it's a Philips.
This is the page about it on an unofficial eMachines support site:
http://www.e4all.info/motherboards/santafe.htm
It's not exactly the same thing as the one in the HP doesn't have an AGP slot. You could try to download one of the BIOS's from that site but, I wouldn't risk it. Don't try HP because they don't have anything for it. The BIOS's on that site are all in, I think Korean.
So if it's not the pins on the drives I think your drive is dead.