desktop won't power up - blinking bule light - power supply?

[djreef]

hi i just upgarde my hard drive when i plug the power supply back in then go and turn it on it it dose not come on there a bule light that comes on that's it. there olny one fan stay on and the other one come on then gose back off

 

[MindoverMaster]

What is your computer hardware specs?

Try disconnecting that new hard drive out, it may be hanging up on that.