This may be a silly question, but have you looked inside the outlet box to determine if there is a two wire + ground cable entering the box. Unless your house is very old, it would be surprising not to have a ground wire. Maybe it's there and not connected properly? I can't think of another reason to be having an open ground. Cheers.
Outlet is "Open Ground" - Is There Still a Safe Way to Connect to My Audio Gear?
So typically from a wall power outlet runs a very short Nordost Power Cable to Nordost's Qb8 "power strip," and then a loom of Nordost Power Cables to my vinyl audio set up All the Nordost cables were bought used and sound great. Having just moved and set up everything in a new room, the nearest power outlet is "Open Ground"(!) Without moving everything around to fit the main Power Cable length to a "Grounded" outlet, please is there a safe and best sounding way to still use this outlet to power everything? Thanks! :-)