Windows 10 update froze my pc

I updated windows 10 and upon restarting my monitor,mouse and keyboard won't come on
Any suggestions would help.. otherwise have to buy new tower
 
Too many possibilities -> bad motherboard, bad psu, bad connections.

In your shoes, I would check my warranty FIRST. If out of warranty, I would pull everything out of the case and do a bottom up rebuild on the top of my workbench...

 
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