Computer turns on right away when power supply is plugged in

[goobawhoba]

Hi, I am building my second computer and i plugged everything in correctly and double checked each plug, and component. When i plug the power supply in the computer starts up right away, all the fans on the cpu, case fans, graphics card start up but there is no beep, and no display on the monitor, i cannot turn it off with power button on the case, i have to unplug the power supply, i have tried a lot of stuff and nothing seems to work please help! My specs are:
510 Watt Power Supply
Asrock m3a770de AM3 Motherboard
AMD Phenom II 880 2.4Ghz AM3 Processor
OCZ Reaper 1600Mhz 6GB RAM
Nvidia Geforce GTX 760 Graphics card

 

[Sooth1]

What PSU do you have (make and model) and do you have your power header (cable from your case power button to your MB) in the correct orientation.

 

[goobawhoba]

Hi Thank you for responding and power supply is a Dynex Model DX-520OWPS and i have fixed this issue but now i have no display any ideas for that?

 

[Sooth1]

What fixed the issue?
You may consider upgrading your PSU to one of higher quality. (Seasonic, Antec, XFX)
Dynex is not known for making good PSU's, and that could be your problem.

 

[goobawhoba]

Ok thanks! Ill try that! and i tried resetting the CMOS from the battery....no good. Then i tried resetting the CMOS from the jumper and worked! How come the battery didnt work i guess from what i looked up it shouldve done the same thing! is it a problem with the battery?

 

[Sooth1]

You may not have taken the battery out long enough. But either way should clear the cmos.

 

[goobawhoba]

Yeah i just took it out and put it back in right away.