Question No Post after housefire?

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May 29, 2024
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6 months ago, i had a low oxygen fire that did massive smoke and soot damge.
very lil heat structure damage and fire was far away from computer which wasnt running at the time as i was out of town.

my mac powers up and works fine but my homebuilt new last year computer powers on and graphis cards led lights go on etc but i dont hear any post beeps nor does any output come out of graphics cards hdmi ports

if it matters i have a Msi tomohawk mobo with ryzen 2600 6 core and corsair ram 8 gb
with rx580 graphics card and evga 650 g5 psu

the mobo, gpu, and psu are new last yr but cpu, liquid cooler and memory are from last board/build.

i cleaned all visible soot with contact cleaner and qtips, still a slight smell but no post or video.
i cant remember if theres onboard post speaker or not but right now im relying on monitor audio, so possible just video output lacking

how do i diagnose if this is a graphics thing or memory or cpu or mobo?
will post about new problems with new laptop cuz of this fire