3. Bulb Doesn’t Light
If a bulb doesn’t light even after you’ve changed the bulb, it’s likely that one of the following is the trouble. Be sure that the cord on your desk lamp hasn’t come unplugged from the receptical. Check the cord to see if perhaps the cord is damaged. If so, install a new cord. Don’t just tape the cord and cause yourself problems in the future. It is also possible that the outlet or the switch controlling the outlet is defective or broken. Check for voltage and replace if necessary.
Bulbs have also been known to be loose in the socket. If so, tighten the bulb to correct the problem.