[SOLVED] Cant boot into anything!

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Jan 23, 2021
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I just built a new computer. i keep getting this message "reboot and select proper boot device". I have tried damn near everything! additionally, the PC doesn't recognize that a keyboard and mouse are plugged into the system sometimes, AND the pc will be powered on but nothing will display on the monitor! please help!

my build:
asus sabertooth 990fx MB
amd 8370 CPU
nvidia gtx 1050 ti GPU
24gb RAM
 
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Solution
I tried it with a 256mb flash drive and it's not even showing up in the bios
What usb port are you using case or mobo if mobo what ports and have you tried different ports? I know dumb question but you wont beleive the number of responses no. But at this point sounds like usb bus/controller is dead