Built a PC, can’t pass startup Process ?

I have built several PC’s prior, newer setup is basic XCLIO tower w/ corsair 750PSU(compatibility?)
Intel DH55HC and i5 Processor,4GB Mem corsair, 240 1GB Invidia GPU,
160HD Maxtor, Blu ray Drive and the message reboot, boot from media/tthen system shut down and started beep sequence 8 beeps
thermal or waht listed in book/got to go on and went into
setup bios/cmos shut down while in system setup (should jumper setting was on setup) tried again
worked then reset jumper to normal, still have error message P16Ex or message media boot fail check cables? checked the cables
a bunch //////////the computer has yet to have any disc processed so this seems absurd
tried the MBord disc won’t run!!!