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New MOBO, RAM, CPU screen won't work

I just installed my new mobo, ram and CPU but for some reason my screen doesn't work and my keyboard or mouse don't light up either. All the fans run and the mobo lights up so I know it should be working but I can't seem to find what is wrong even with reading through these forums. Anything helps thank you.
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  1. Sorry forgot to add
    MSI 990FX GAMING
    corsair vengeance 2x8 1600
    AMD FX 8350
    Radeon 7970
    Psu 850W
  2. Need to problem solve a little to reduce the number of factors that could be at play.

    1)- unplug any dedicated graphics and try using on board hdmi output to see if you get bios post (you can keep this setup for subsequent tests)
    2)- Only boot up with 1 stick of ram and switch them out to see if it boots with 1 or other.
    3)-More messy so don't try this first- Take out cpu and put back in (know what you're doing with this step as reinstalling cpu is harder than first install, thermal paste cleaning etc.
  3. Best answer
    flu2120 said:
    Need to problem solve a little to reduce the number of factors that could be at play.

    1)- unplug any dedicated graphics and try using on board hdmi output to see if you get bios post (you can keep this setup for subsequent tests)
    2)- Only boot up with 1 stick of ram and switch them out to see if it boots with 1 or other.
    3)-More messy so don't try this first- Take out cpu and put back in (know what you're doing with this step as reinstalling cpu is harder than first install, thermal paste cleaning etc.


    ____________________

    There is no on board graphics, so that leaves that out, check all your connections (especailly power (24 and 4/9 to the mobo, PCI-E to the GPU.....might also be a short and may want to bench it, have a guide I wrote that might help here:

    http://www.tomshardware.co.uk/faq/id-1753671/bench-troubleshooting.html
  4. OK I'm about to check through those. Àlso did I need to download the mobo drivers before installing it?
  5. I don't know exactly which step fixed it but it is working now. Thank you very much
  6. No worries, glad all is well ;)
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