Guitar lost most of its output

Epsilon

I have a dual humbucker guitar that today when I plugged it in appears to have lost the majority of its output. Where any other guitar would be driving an amp with exreme distortion, this one remains quite clean.

I don't think its a pickup issue, as it affects both pickups, so unless they've both de-magnetised quickly and simultaneously I think it must be something else.

The guitar hisses/hums a bit if the volume isn't on full. Suggests there might be a problem with the pot? Wiring all looks fine to me...

Anyone had an issue like this before? All help appreciated!

Alegree

Jack connection maybe? If it's a standard Gibson 4 pot configuration, you're looking at an issue between the switch and the jack if it does the same thing in all pickup positions. 

prowla

Any sound when you move the pots back and forth a few times?
What happens if you switch to only one pickup?

Funkfingers

If the guitar has active pickups, EQ or a built-in booster device, this circuitry requires +9v power. Check the condition of the PP3 battery and its connections.

On a general level, the remote diagnosis of guitar wiring issues is greatly aided by the inclusion of basic information about the guitar make/model, a schematic diagram and photographs of the wiring in your actual guitar.

Could be something as simple as a dried solder joint.