I am getting 4 beeps and red lights when I attempt to boot. I have followed the advice for diagnosing the problem on the motherboard and have determined that it is caused by a drive being plugged in any of the three slots on the SATA Power cable. I have tried several different drives including a brand new SSD drive. I suspected the power supply, however everything else seems to be ok. I do have one old Seagate 500gb drive that doesn't work which, when plugged in the SATA power cable, allows the computer to boot to the BIOS or to the USB boot media I created to reinstall Windows 10 Pro.
What would be the next step? Replacing the SATA power cable?
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