My computer won't do POST when switched on. Is there a way to determine which component is the culprit without replacement parts?

My computer won't do POST when switched on. Is there a way to determine which component is the culprit without replacement parts? I've taken everything out from the computer there is only the motherboard with the CPU in it. When I switch it on the fans start, but nothing happens. No beeps, no POST.
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Guest [Entry]

I would love to hear differently, but I believe at this point you need parts to swap in to test now. The only advice I can give is that a new PSU is likely to be the easiest and cheapest to swap out.