Line fault at the outlet -- do I need an electrician?


Yesterday, I got a Panamax, Max 1500 surge protector and line conditioner. (I got a very good deal on it, and am just trying it out.)

I plugged it into an outlet I've been using for a while and one of the red lights on the front lit up saying "line fault." (I'm not sure how this is different from a "ground fault." Maybe it's the same.) The Panamax does not do this with other outlets in the room. They seem ok.

So, I know this means that the outlet is improperly wired. My question is, might this be a simple thing to check and/or fix? Any suggestions most appreciated. It's the only outlet I can use to have my audio set up where I usually have it. Now is not an optimal time to call an electrician. If this is a big problem, I'll try out my gear somewhere else in the room, but if I can fix this without too much expertise, that would be ideal.
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Got it. All those are good questions, but I think the ultimate solution is to delegate this whole thing. But now I know what to ask the professionals. This amateur is sticking with writing and teaching. Thanks again.
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Thanks for that process. It sounds like this test does not require me taking the outlet out --just testing the ohms with the multimeter. That doesn't seem very unsafe, but I'll follow instructions carefully if I do it.
OP:

Your circuit is fed from a sub panel, correct?  Is the circuit fed from an independent breaker, or is it a duplex?

Also, have you seen any boxes in  between the sub panel and the outlet?

Best,

E