@alexoiu , thnx for your reply.
first i tried changing the jumper positions , nothing .
then i removed the cmos battery and changed the jumper positions again , still nothing happened.
and as for your 2nd question , when i power on the pc nothing happenes - the hdd doesnt spin up , the fans dont power up ect. only some LEDs in the mobo light up.
do i have to buy a new mobo ?
pc specs are
a10 6800k
4gb RAM
CM 450w thunder
WD 500GB HDD
had win 7 x64
and u already know the motherboard