Outlet not working, reading "open ground"
Bought the house a few month ago, there was a TWO prong outlet over the mantle that I want to plug my TV into but it didn't work. I didn't put a tester on it until after I tried replaced it but I used a working lamp and it didn't work.
I bought a surge supression outlet ($20 a homedepot). I have a metal box and the ground is coming from to the wall somplace and screw down into the box. I bought a ground wire with a nut and connector on it, unscrewed the box ground, used a wire nut and put hte new ground wire and new ground together, then put the connector under the nut on the box, and another connector under the nut on the box and went to my outlet.
I tested it and its saying I have an open ground. What things should I look it, I have a multimeter, what should I do with it to further test?
I have an outlet in a different room on the SAME wall that I knew didn't have one plug working so I tested it, open ground as well. The bottom plug works, the top doesn't on that outlet. It's seems possible that they could have tried to come off of that outlet, if they spliced from that top plug on this outlet, and the outlet is bad, could it be not working because its just a bad outlet?