Comp wont turn on when 2nd drive attached

For a long time now I have had my main drive(160 gbSeagate Barracuda 7200.7 IDE) and a backup drive(320gb Barracuda 7200.10 SATA 3.0). I decided the other day that I was going to make the backup my main as it is faster. I go to turn my computer on today and it wont boot. The fans turn on for about a sec as do the led's then it shuts down. I go to turn it on again and nothing, the fans dont move, the leds dont come on....nothing. after messing with it i have figured out that the only way the computer will work is if i disconnect the 7200.10 drive. I have 2 dvd burners and whether i have those connected both, none or one....the only way the computer comes on is if the 7200.10 drive is not connected. I have tried different cables and the only issue is that hd.

Is it safe to say that hd died?

AMD 64x2 dual 5600+
3.25gb ram(really 6 but xp only sees 3.25)
windows xp pro 32bit
Pioneer 112D and 212D
asus m2n plus nforce 500
antec 650w power supply

ill see if i can put it in my buddies system and see if it works then