[SOLVED] Changed mobos and now pc won’t boot up

Dec 10, 2020
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I changed motherboards from an as rock zkiller 270 to an as rock itachi to support 9th gen cpus.

After replacing it my pc won’t boot up at all or even give a signal part of it is working. in the past the pc has started running then overheated or flashed red in to tell me something is wrong. I have tried and checked everything but nothing is working.