Unable to boot after CPU Upgrade

[b3vis]

I upgraded my CPU from an AMD Athlon II to a FX 8350. I am positive I installed it correctly. I plugged in my mouse, keyboard and monitor and my computer stays on. I do not see any image on the screen or hear any hard drive activity. I have the latest bios from Biostar and ive been looking around and havent seen any suggestions that could help me.

 

[numanator]

What motherboard model do you have? What are your full specs? What PSU model/brand?

 

[b3vis]

What motherboard model do you have? What are your full specs? What PSU model/brand?

My motherboard is a Biostar A880GZ.
Windows 7 Ultimate
8gb ddr3 RAM
New Cpu: AMD FX 8350
Old Cpu: AMD Athlon II
Bios Version: unknown for sure. I updated it late last year.
PSU: HP PS-6301-9 300W max.

 

[numanator]

What graphics card do you have? Also try putting the athalon II back in and updating the bios to the most recent version.

 

[b3vis]

What graphics card do you have? Also try putting the athalon II back in and updating the bios to the most recent version.

I have found my issue while I was looking for the PSU information you needed.
As a precaution to not get shocked, I unplugged the power going from the CPU to the motherboard.
When I placed everything back I forgot to plug in the last PSU cable to the Motherboard.
I hope I have not caused damage to my computer in any way by having this issue.
I have turned on my computer and it is running as it should.
Thank you for your speedy response even tho it was my own issue that I did not realize.

 

[numanator]

Glad you got it fixed!

 

[kunthakenthe]

i dont think 300w is enough a fx 8350 can use like 125w. also what gpu you have.