How do I know if my LED driver is bad?

Still Having Issues, Use a Multimeter?1.) Test the AC Input with a Voltage Multimeter.

2.) Apply your test leads to ac power source.

3.) Check AC Voltage Reading on Multimeter.

4.) Set Power Supply to Proper Input Voltage Setting.

5.) Measure the Output DC Voltage.

6.) Apply your test leads to DC Power Source.

Shenzhenshi Zhenhuan Electronic Co.,Ltd was founded in 2008, specialize in external power adaptor, ac dc adapter, Outdoor Waterproof power supply, led driver , Power Transformer , switching power supply, dimmable or non-dimmable LED Drivers and Battery Charger in Shenzhen, China.

Zhenhuan is one high quality Power Supplies manufacturer, we also have own brand  KSPOWER, and our products of power range from output 4.2W to 384W (output voltage 4.2V to 48V, output current 0.2A to 20A) a total of 1000 kinds of models and come with safety regulation standards: IEC/EN 62368, IEC/EN 61558, IEC/EN 61347, UL/cUL 62368, UL/cUL ETL/cETL 8750, UL/cUL1310 CLASS 2 and in full compliance with UL/cUL ETL/cETL RU/cRU CE ROHS SAA C-TICK KC KCC GS TUV FCC CB NOM CCC PSE CB certifications for global markets.