New Computer won't start, high pitch noise from PSU Please help!

I have a new Thermal Take TP-750 power supply along with all the new parts for my computer. I got everything setup and the computer won't start. Whenever I hit the power button, my PSU starts making this moderately loud whine. I don't know what is causing this, but I'm sure it's not the fan, because it doesn't even start, neither do the other fans in my machine. This is my first time building a computer so I just want to know if I messed up or just got unlucky. Please help me!
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More about computer start high pitch noise psu
  1. Go through this step by step and see if there was a mistake If everything checks out then most likely you got unlucky and got a bad PSU.
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