Dells are a quality machine but they're kind of a PITA sometimes. The company isn't exactly forthcoming with service information. You have to dig for it. HP's are much better in that regard.
Anyway ... *whatever*.
To cut to the chase: There's a fair chance that it's a problem with the BIOS.
I would try updating that before parting the machine out.
This link "should" do it for you.
https://www.dell.com/support/home/us...esktop/drivers
Look for the BIOS update labeled urgent. ( It was just released a few days ago.)
* Fairwarning * Make sure that your PC can't accidentally power down partway through the BIOS update process. That will brick the BIOS and make the machine useless.
It's probably running win 8 or later. Go to power settings and temporarily adjust them so that neither the HDD or monitor can power down after a certain period of inactivity.
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