new motherboard installed, but won't boot

[compdict]

I just installed a new motherboard onto my case, got the cpu in, and all
the connectors connected (I think?), but the computer won't turn on.
hard drive, ram etc, are all installed, I really don't know what to do.
please help me. thanks. later then.

 

[Cari \(MS-MVP\)]

Does it beep at all? If so, how many beeps (and are they high or low).

Can you get to the POST screen and the BIOS?

Does it post if you remove...:

hard drive(s)
optical drive(s)
every card BUT graphics card