Question My PC says no signal?

Aug 4, 2020
CPU: ryzen 5 2600
Motherboard: Gigabyte B450 DS3H wifi miro atx am4
Ram: Corsair vengeance 2 x 8GB
Storage: Wstern digital caviar blue 1TB harddrive
GPU: XFX Radeon RX 580 8 GB
Power supply : EVGA BQ 600 W 80+ Bronze

This is my first pc build. Pc was working but the monitor would randomly say no signal and I would have to hard restart my pc for it to display anything. So I took out my graphic card and made sure all the connections were good but when I turn on my pc it would not boot(no beeps either) and gave me a blue screen that says no signal.

So I thought it was my gpu so I sent my gpu back and they gave me a new one but when I plugged this one in the screen was blue and said no signal again. Then I took apart my pc and looked at my cpu. The cpu look fined and I didn't find any broken or bent pins. So I built the pc again and when I powered the pc everything got electricity and then stop getting electricity. So I tried to plug everything in back make sure everything in the right place and when I turn on pc again the pc started smoking in between the motherboard and the 24 pin connector. I turned off the pc and now confused on how to solve my pc problem.

Thank you for any help
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