1 Call Delta customer service and give them your SN number so they can check it.

2 Write down the model and batch number of the power supply and check it online

3 Look at the anti-counterfeiting mark on the power supply

4 Remove the power supply shell and check the connector HOUSING terminal. Delta generally uses MOLEX or CAROL. Generally, these two suppliers have more connectors, and other copycat manufacturers cannot buy the raw materials from these suppliers. There is a sign and it is easy to see.