Guys help me

I just bought second kit with corsair vengeance 1866mhz.I mount them to mobo and shock. After switch on ... nothing. Black screen, lcd in stand by mode, mobo A2 code and nothing Im depressed

I try:

- demount new kit - false
- reset bios - false
- switch to second bios - false
- unpluged hdd - false
- change sata port - false
- change pcie port for gpu - false

Everything was working before. Now nothing is working... is my mobo is dead or what ?