Clevo p370em black screen

Hello
My clevo went wierd

Fans spinning
Keyboard lights are on

But nothing more happens

I took away both hdds, cmos battery
tested ram
2 minutes hold the ON button
Switched gpu cards [680 sli]
new cooling past on cpu and gpus

I dont see bios whem I start the clevo?
Dvd spinns when i insert a dvd
Hdd spins

Im all stuck, dont know what to do

Best Regards
Smergubben