PC Powers up but no display. Power button turns on but won't turn off. Reset button won't work either

[Core44D]

My PC powers up, (no beeps) however 2 different monitors show no display. In fear of a fried MoBo, I went out and purchased a new processor, AMD fX8350, new MoBo Asus Sabertooth 990fx, new DDR3 Patriot RAM, and new graphics card, Asus GEForce GT640. After installing all, my problem still persists. I am now thinking it might be a power supply issue, however my thermaltake 600w is only 4mo old. This is very perplexing to me. Please help.

 

[i7Baby]

Go through Tom's checklist - http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

Double check you connected BOTH the power supply connectors to the motherboard.

 

[Core44D]

Omg. I'm a dunce. Thank you

 

[adrianguerraii]

My PC powers up, (no beeps) however 2 different monitors show no display. In fear of a fried MoBo, I went out and purchased a new processor, AMD fX8350, new MoBo Asus Sabertooth 990fx, new DDR3 Patriot RAM, and new graphics card, Asus GEForce GT640. After installing all, my problem still persists. I am now thinking it might be a power supply issue, however my thermaltake 600w is only 4mo old. This is very perplexing to me. Please help.

 

[adrianguerraii]

For me I had exactly the same symptoms. The cause was a bad cooling fan on the power supply. Solution: Replace entire power supply or if possible, replace the fan. My opinion is if it still powers up then try to replace the cooling fan first. Less expensive to replace fans. You can check to see if this the issue simply by looking at where the fan vent is to see if the fan is moving or if you can feel any air movement.