Just bought a yamaha rgx 211. When I plug it in there is only noise like a wire is hooked up wrong.

A bad ground connection?. Try tightening the nut on the phono plug first. You can pull out that section where the cable hooks into and visually check the solder connections.

Yes it will work.

Chances are there is nothing wrong with the mixer. IF you accidentally turned on Phantom power, that would cause the problem. Phantom is ONLY used with condenser mics and a few DI boxes. Turning it on can create noise unless balanced lines are used everywhere.

my guess is two positions at one end work(aka 1 and 2, or 4 and 5)? if yes, then 2 of the pickups are wired wrong. (if 1 and 2 work, which are the forward positions, then the middle and bridge pickup are wired wrong, etc.) the problem is there is a variety of 5way switches that are different. i would guess yours is "import" style. are there 8 lugs in a single row on the back of the switch? if yes, you probably have an import switch. best i can do in text is tell you that the middle two lugs are common. this means one goes to the volume pot, and there is probably a little jumper between the two lugs as well. now there are 3 lugs on either side of those 2 common lugs. one set of 3 will probably run to the tone pot in some fashion or be empty. the other set of 3 lugs is for the pickup lead wires. it sounds like at least one or two of those lugs are empty but shouldnt be, or are wired wrong. i cant tell you colors of your wires without seeing it, but this is how it should be, with the exception that the tone knob will probably be on the bottom 3 lugs somewhere. 1 would be the neck pickup, 2 the middle, and 3 the bridge hope this helps, feel free to post a pic of your wiring, etc

Don't mess with it and risk voiding your warranty. These are a servoed speaker and there is a problem with the feedback in it. Exercise your warranty immediately.

If new, exercise your warranty.

Wow. You most likely broke a connection on the back of the plug receptacle. Take it to a Certified yamaha, or electronics tech. Perhaps the music store you bought it from. Make sure they do it in house, or find out what tech they recommend. might save you a few bucks of mark-up.

There is little or no hope that this can be fixed at home, sorry . If it lights up and you have power and still no sound, it may be simi cooked, not to say it couldn't be fixed. But lots of times these days Tecs want as much to repair as a new one. Balanceit out for a new one , to the repair cost . You may just find a new one is the way to go.But never toss out, junk is someones treasure. good luck DFD

http://images.google.com/images?hl=en&q=guitar+wiring+diagrams&um=1&ie=UTF-8&sa=X&oi=image_result_group&resnum=1&ct=title

Here is a bunch of Diagrams courtesy of google images.