Ground wire is not attached - Dean Evo Xm Electric Guitar Natural Mahogany

The most likely problem would be wiring. By dropping it you loosened or disconnected a wire.

Thee is a standard wiring connection for stylus cartridges. Looking at the rear of the cartridge, there are four connections. With the stylus point down, starting at the top left and moving clockwise:-
White wire - Left channel out (10 o'clock)
Red wire - Right channel out (2 o'clock)
Green wire - Right channel ground (4 o'clock)
Blue wire- Left channel ground (8 o'clock)

Alternately the connection arrangement could be in a vertical line with alternate pins staggered. In this arrangement looking from top to bottom it will be :-
White wire - Left channel out ( Top left)
Red wire - Right channel out (Second right)
Blue wire- Left channel ground (Third left)
Green wire - Right channel ground (Fourth right)

I hope this helps

Taylor make a factory solution for this issue- you basically need a metal strip located where the ball ends of the strings anchor, and a wire running from that to the ground on the output jack. The Taylor piece is about 25.00, but is only good for pins that are in a straight line, not the "vee" shape of some of the Stratacoustics. I have made my own version through the years, using thin piece of metal, holes drilled to match the alignment of the bridge pin holes, held inside in line with the bridge pin holes by two-faced carpet tape (the thin kind)...with a wire soldered to it that is then run to the ground tab on the output jack. Then any time you touch the strings, you ground the guitar. This is usually a problem caused by the ground attachment on the under-saddle pickup, btw, right where the wire joins the pickup under the saddle.

Here is the wiring diagram for a 2 humbucker, 2 volume, 2 tone, 3-way switch setup. The wires off the pickup may be a little different. Just attach the lead wire to the arm of the pot and the ground to the ground on the top of the pot. Should be very strait forward.

http://www.seymourduncan.com/pdfs/support/schematics/2h_2v_2t_3w.pdf

get a 3 way adapter,, plug your amp into the adapter, and secure the ground wire to the center screw in the receptical cover , or if it comes with a tab instead of a wire, secure that

If you are in the US, take a length of light-gauge wire (AWG 20-24) attach it to the center screw that keeps the cover on over the standard dual AC receptacle and to a screw on the back of your unit. This kind of problem often is caused by a poor grounding of the cover or chassis.

If it is a coax with a wire in the center and a shield outside, the wire will attach to the contact that touches the tip of your plug you insert. The shield will attaach to the part that touches the sleeve of you plug. inspect the jack carefully as they can be foolers. When stripping the insulation back un-braid the shield a little to be able to solder it to the jack. Use a pair of needlenose and a helper to keep soldering heat from going up the braid and melting the insulation of the internal wire. Test unit before putting cover on.

We have no idea what model instrument this is... maybe a piano??? The metal is undoubtedly for electrical shielding... nothing magic. Glue some aluminum foil with contact cement to your replacement wood. Using a screw and a terminal lug with a wood screw, attach the wire to the foil. One can also buy adhesive backed aluminum tape, but the width of that is limited to about 2 inches wide.

This happens when you have lose earth connection from your main source power supply. Check the earth connections (grounding) which should be available in the mixer, i.e some power cords don;t have earth wire, so change this if you think yours don't have it. Also check the grounding of the other items attached to your mixer, basically grounding is very important to reduce the static shorts. Try changing the power supply source, change to other outlet and check if it is OK.

That is LIKELY a ground wire. Often it will attach by some means to conductive paint in the cavity of the guitar to act as shielding to reduce hum. Sometimes it is soldered to the back of a pot.

Search this site for a configuration matching your guitar for schematic.

http://www.guitarelectronics.com/c=WdFPr9QORFrwx9ORFVwTPM96v/category/wiring_resources_guitar_wiring_diagrams/