Ceiling light fixture was blinking in and out. Replaced the switch
(single pole, no outlet or anything else in box). Now nothing at all.
Old house, mostly old wiring (knob & tube). $2.00 little voltage
tester, the kind with two prongs and little christmas tree bulb, shows
no juice at switch (touch ends to the exposed wire ends) or at the
fixture (again, touch ends of tester to exposed house wire in box).
Have checked and turned off and on circuit breaker (upgraded panel),
and no problems with anything else on that circuit. Do I need to try a
better tester, or is everything fried somewhere in the line, leaving
the choice of no more fixture or ripping apart plaster in old
house(cha-ching cough cough)?