Solve : usb keyboards wont work but phone chargrr will.?

1.	Solve : usb keyboards wont work but phone chargrr will.?
Answer» No, nothing will come up not EVEN the BIOS screen. I just realized that neither of my fans are working, maybe I overheated something? OK so I opened up my computer. The fans somehow got stuck in the grate protecting the outside of them, and now there's lots of DUST in the PC. So in the morning I'm gonna blow all the dust out and see if the fans will work. Also what I read on another forum is to TRY unplugging everything from the motherboard, making sure there clean, and PLUGGING them back in.

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