RHEL - 8.3 - Not being able to wake server after it went into Suspended Mode

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RHEL 8.3 on bare metal server (AMD Phenom 1090T Six Core Processor, Gigabyte GA-880GM-UD2H Mother board, 24 GB RAM) went into suspension due to non usage for about 15 minutes under Power Management.

Now it wakes up with blank black screen, even after hard reset (5 seconds of power button press), the situation remains the same.

Even when the boot HDD has been removed and a new blank HDD replaces in its place, the situation remains the same. System does NOT have any other storage except for the boot HDD, NO SDD exists. Now since BIOS cannot be reached, hence RHEL cannot even be re-installed, nor any grub command be executed.

Please advise how to resolve this situation.

AT

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