Is my Cpu dead?

May 1, 2018
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Hi . Recently i change mi cpu fan for a cooler master t4 but when i start my pc the gpu start to spin and few seconds later stop. My board dont make any beep and ethernet led dont turn on. Also usb dosent work and have no. Video. I clean RAM . Reset BIOS and dont know what to do.
My specs:
Mobo msi 970a g43
Cpu fx 8320e
PSU evga 500w
Gpu amd r7 250
Help please