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HP Omni booted with blank screen after motherboard replacement

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HP Omni 27
Microsoft Windows 10 (64-bit)
So I recently replaced the motherboard on my HP Omni 27 due to a couple of reasons: couldn't boot up, no beep when rams removed, the fan got really loud, some pins connected to CPU got bent, etc.
Well right after replacement this one beep right away due to dislodged rams (5 long beeps). So then I reseated the ram. No beep. But nothing on screen either. This time the fan runs normally.
I'm wondering if there's some BIOS setting to do after replacing the mobo that I don't know. Or any other post-installation tasks.
Thank you.
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HP Support Agent
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Thank you for posting on the HP Support Community.


Don't worry as I'll be glad to help, As we have limited support boundaries in the support community as of now.

I would request you to contact our Support and our Support Engineers should be able to sort this out. HP Support can be reached by clicking on the following link:

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