i like to know if i cant turn it on with no hardrive in it .
all i like to see is the led .
well how it will look that all .
i do have every thing in but not the drive .
i will get it next week
thank you

I'm sure that it will power-on and show you the loading screen, but you can expect to crash and recieve a BSOD in a few seconds.

Hello yvesj,

Yep, it should still boot, but you'll get a "no HDD detected" type error.

thank you .
but i don't want it to be conected to my monitor .
just turn it on and look at lighting .
blue fans .etc.etc

but i screw up any thing doing so

Nope. It will not not mess anything up. It'll light up, and that'll be about it until you finish it.

I wonder if you set up the CMOS to boot from the USB drive as the first option, that it would let you run without a hard drive. Of course, you'd need to have a complete OS installation on the USB drive. But if there's a mandatory check for a boot sector on C: as a core part of Vista and W7 boot up functionality, then it wouldn't be possible.

Nope. It will not not mess anything up. It'll light up, and that'll be about it until you finish it.

thank this what i wanted to know .
this is the case i have and i have to order 2 [60 mm] led fan for the back and some laser light and maybe a few 88 m led fan so i have to turn it on to see what i need so it be looking good when am done with it .

thank you .but i never ask to boot my pc and use it .
all i ask is to turn it on to see the led fans and laser light .etc.etc.

when i boot it i will have the drive in that will be next week this is when i be receive it .right i am not looking for that .
i have my cd and my key's for vista 32 bits home preminum