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Table lamps are common household lighting appliances. If it doesn't light up, the following are possible reasons:

1. Burnt bulb

An expired bulb or excessive voltage fluctuations may cause it to burn out. The solution is to replace the bulb and see if it lights up normally.

2. Power supply problem

First, check if the power strip is supplying power. Then check if the power cord is broken or damaged. If the plug is loose, try reinserting it and turning on the lamp.

3. Switch malfunction

The switch controls the on/off state of the circuit. If the switch is damaged or has poor contact, it cannot control the bulb's on/off state. Try switching the switch on and off several times or replace the switch to test.

4. Circuit problem

If you've checked all the above and still can't determine the problem, it's likely that there's a problem with the lamp's internal circuitry. This requires a professional electrical repair technician to diagnose and repair it using specialized tools.

Final Summary

The above are common causes of table lamps not turning on and their explanations. Users can check and repair according to the actual situation, or contact professionals for repair.