How do you fix a broken tube light have done the usual - on off button got new tube light banged slapped cursed the framing moved the wires - nothing any ideas what could be wrong?

If you refer to a flurecent tube you need to check the starter if it has one (small round tube in the side of the light), check the fuse box for that light, check the switch for that light and check that the tube youve banged about has not also blown i.e. check in another tube socket if possible