If the instrument doesnt play at all, there are a couple of things you can check yourself and often even resolve them as well.
The prime reason would be a serious leak. This can either be caused by
1. a crack
2. a pad that doesnt close
3. a key which doesnt close
4. a key which gets opened accidently or be bend.
To distinguish the problem, proceed as followed:
First check for the seal of the joint. To do so close all holes with your fingers, close the end of the bore with your thump and suck on the joint like you would try to suck on a bottle.
The skin of your fingers should be pulled towards the inside of the instrument and stay there, even after you stopped sucking. If the suctions disappear, you probably have a leak.
1. Check for cracks, in particular close to the tone holes, the register/octave hole or tenon joints. If you find one check out our articles about cracks.
2. Check with cigarette paper if you have a proper contact between the closed pad and the tone hole.
If not contact us or the last person who worked on the instrument. (you might have it covered by warranty)
3.There are some keys which might not close because the adjusting screw is out of adjustment. This is often the case with the G adjusting screw. If that one is to far in the G# can´t close, Just loosen it a bit and try if it plays.
4. If a key is bend, contact us or a repairman you trust. This can often be caused by transportation, even when it was sent in a case. Make sure that the instrument has no change to wiggle around when you ship an instrument. We developed special plugs to prevent this from happening.
5. If the problem only arises now and then it might be that you hid some keys by accident. This is often the case with the left hand Eb/B key on the top joint or the lower joint side H key.