the raisers are needed in mounting the MOBO. i never have seen a case come with them pre-installed...figuring the whole placements is different on all MOBO's.
the only case that i saw that doesnt need them raisers are them pre-built ones thats from like emachines, hp, etc.
to - xxc00lmanxx
is your motherboard new?
if its not, then have you got any post beeps when you start the system before the pop and flash?
my MSI board i use now never had a post beep, even when something was wrong with it. Then i installed this little speaker thing onto my mobo that came with the case (little plug thing like the power, resest switch pulgs, and has like a small circle at the end of it.) After i put that in, i started to get post beeps.
looks like this