I have a Hp core i7 pc with 4 gb gb ddr 2 ram.Psu is 250W,its been a long while when i try to boot my pc it gives beeping ,i have noticed the beeps they are 20 in total,but they occur in 5 loops of 4 beeps,i really dont have any other part or object nor budget,i hope you people will figure out a way to tel me how to fix it,Thanks in Advance.