PC makes 3 long and 2 short beeps noise

Hello,

Hey everyone, my computer got 3 long beeps and 2 short beeps, and the monitor is says no signal, i think my computer also does not boot,i already tried to clean my RAM or replace cmos battery but no luck,i also tried to unplug all power and pressing the power button for 1 minute but its not help,can somebody tell me how to fix it,help me!