Computer problem!

Hi there, I was installing a case fan onto my computer, I think I heard a spark kind of sound, however I'm not 100% sure. My computer will turn on, with all my fans running fine, however none of my peripherals are working when plugged in. This includes my monitors / mouse / keybord etc. These peripherals are working fine when used on my laptop, however not on my desktop.

Could anyone advise what has happened, or can advise what steps I need to take to remedy this, and if so, do I need to buy new parts?

(Sorry I'm not too good with computers)

Cheers.
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  1. Welcome to Tom's Hardware Forums,
    Couple of questions for clarification. Was the PSU plugged in at the time of the case fan addition? Was the PSU on (switch in back in "I" position)? Last, what are your system specs?
  2. Yes, the PSU was plugged in and turned on.

    System Specs:

    AMD Phenom x4 955 BE Processor
    Asus M4A87TD Mobo
    8GB Ram
    Nvidia GeForce 460
    1TB HDD
    64GB SSD

    My computer was running fine before all this. :O
  3. First, a verbal "spanking".
    Never (infinity), work inside of a computer while it is plugged into a power source.
    Now that I covered that, try resetting your CMOS clock since that'll be the fastest, cheapest "fix", if it works.
    If the reset does not work, are you getting any POST beeps from the computer?
  4. Reset the CMOS, didn't work. Not getting any POST beeps from the computer, although I don't think I ever have.
  5. I think your best bet at this point is to troubleshoot using this guide (even though it says for new builds, it is still quite effective for newly troublesome computers also)
    http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
    If you have any questions, throw them on out here, we'll provide what help we can.
    Good Luck
    EDIT: you'll have to skip quite a bit going through that guide - sorry.
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