|Apparently you didn't benchtest the board before you installed it?|
It's pointless to install a non-working board in a case but you don't know if the board is working or non-working unless you benchtest it 1st. If it tests good on the bench, then doesn't work after it's installed in the case, you'd know the problem is with the installation, not with the board. Right now, you have no idea if the board is bad or if you installed something wrong.
I suggest you take the board out of the case & start from scratch.