Mobo showing Red Cpu Led

[Abhraneel Roy]

Before 1 hr i have been able to use this computer fine and have been able to use it for a year and never got any problems to play any games on it. 
Suddenly when i enabled fast boot from Windows , my pc restarted and now it wont boot...
Mobo showing red CPU light , would be on for 2s then turn off quickly then the DRAM led would flash on for a second and turn off and it would go back to the CPU led. It would cycle like this every 20 seconds
It used to work just an hour ago.
Dont know what to do right now.

Tried to reset Cmos using screwdriver but still not working.

[Srijan Verma]

remove coms battery, keep it out for 2-3 minutes(on the safer side). put it in and boot.
This will reset all bios settings to factory defaults

[Abhraneel Roy]

7 minutes ago, Srijan Verma said:

remove coms battery, keep it out for 2-3 minutes(on the safer side). put it in and boot.
This will reset all bios settings to factory defaults

Tried , still not working