Dell XPS 4th GEN won't boot


Jul 8, 2011
I received this machine a day ago not working.
Intel Pentium 4 Dual Core
2Gb DDR2
NiVida GTX 6800
250Gb HDD
Standard Intel mobo and PSU

Guy said the hard drive was bad. Long story short hard drive wasn't bad. It had been set up in a RAID-0 system that came standard on the machine, so it couldn't be recognized. I have installed Ubunto 10.10 on the drive using another computer. Hooked up the drive and I get nothing, no BIOS just a black screen with a blinking cursor. I hope that this boot problem is just something simple that I am over looking or if the computer can only run in RAID-0. Any advise is helpful.