[BB_TX]

Those little push button switches in ours are cheap and prone to fail if that is what yours has. I have replaced them in both of our living room fixtures and the two beside our bed. If you have power to the switch but no light, they will need replacement.
I could not find any switch locally that would fit that very small space available. I did find a manufacturer name on the switch. No part number, but with name and basic info I did find the exact switch available with a google search.