PC show nothing after turning on

[Pedramh]

hi everybody
when I turn on my pc all the fans work fine but there is no beep , nothing on the display & no power in dvd drive or keyboard. I should turn it on & off few times to system boot normally.
I assume the problem is with one of the mainboard capacitors but I'm not sure
thanks for your answers and sorry for bad english

 

[ImPrettyIrish]

Try to take out your RAM and boot your PC. You should hear a beeping noise repeatedly. (depending on what motherboard you have) Did you try to overclock before you were doing this? I have done this once and I had to reset my bios.

 

[Pedramh]

Try to take out your RAM and boot your PC. You should hear a beeping noise repeatedly. (depending on what motherboard you have) Did you try to overclock before you were doing this? I have done this once and I had to reset my bios.

I took the RAMs out, repeatedly beeping as you expected.
No I didn't over clocked anything since two years ago.

 

[ImPrettyIrish]

Try to take out your RAM and boot your PC. You should hear a beeping noise repeatedly. (depending on what motherboard you have) Did you try to overclock before you were doing this? I have done this once and I had to reset my bios.

I took the RAMs out, repeatedly beeping as you expected.
No I didn't over clocked anything since two years ago.

ok well there's nothing wrong with your motherboard... here is a link that gives a step by step tutorial on what to do in this situation http://pcsupport.about.com/od/findbysymptom/ht/nothingonscreen.htm

 

[Pedramh]

Try to take out your RAM and boot your PC. You should hear a beeping noise repeatedly. (depending on what motherboard you have) Did you try to overclock before you were doing this? I have done this once and I had to reset my bios.

I took the RAMs out, repeatedly beeping as you expected.
No I didn't over clocked anything since two years ago.

ok well there's nothing wrong with your motherboard... here is a link that gives a step by step tutorial on what to do in this situation http://pcsupport.about.com/od/findbysymptom/ht/nothingonscreen.htm

I googled and found this article before. I have already test it with another PSU , RAM and hdds nothing wrong with them. Thats why I thought it was mainboard

 

[Pedramh]

The problem was with two of the mainboard capacitors near PCI-E slot . I changed them with two identical one ,and it solved the problem.

-Posting this in case anyone came here for the solution