No Signal To Monitor From MB - Fans Are Spinning Ok, CD ROM Ok

Strange thing happend to me yesterday with my new gaming PC... it was running fine and then i let it to sit for about 1 month with no cables... yesterday i put the cables back on and i get : No Signal from Motherboard to the Monitor... :(

i try :

1- Remove MB Battery and put it back on
2- Remove RAM's and put it in different slot
3- Restart CMOS
4- Hold down the Power Button for 1 min without Power Supply Cable In

None of them works, still get no signal, the fans are spinning, CD ROM is working fine... but No Signal to Monitor :((
The monitor is ok, VGA Cable is ok also cuz i try it in another PC...

I'm out of ideeas i swear :(

PC Config :

MB : AsRock FM2A88X Extreme 4+
Processor : AMD A8 6600K
RAM : 2x4 (8GB) Kingston HyperX 1866Mhz
SSD : Kingston 128Gb V300
HDD : Seagate Barracuda 1Tb 7200rpm 64Mb
Power Supply : Valeo Tacens 900w Bronze Certificate