How to identify a qualified LED display power supply?

2016-11-28

From the appearance of the power supply's process.
From the full load efficiency of power supply.
From the constant voltage power supply output voltage ripple. The size of the ripple of the life of electrical equipment has a very big impact, the smaller the better ripple.
The opearting temeperatue of the voltage.
Checking the voltage's phsical change while playing video and picture.
The life span of the power supply
Choicing different type power supply according the applications

next:No