Does the power LED provide any diagnostic information, such as error codes or status signals, during operation?

The new version adds the 3.3V/12V power LED, which can directly show the PSU work status.

Questions & Answers: Dual Power Supply Connector Add2PSU Multiple Power Supply Adapter, Synchronous Power Board, Add 2PSU with Power LED to SATA 15 Pin Connector

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Dual Power Supply Connector Add2PSU Multiple Power Supply Adapter, Synchronous Power Board, Add 2PSU with Power LED to SATA 15 Pin Connector

1.The new version add the 3.3V/12V power LED, It can directly show the PSU work status
2.Use this card to turn on and off the two power supplies with low power at the same time, thereby increasing the power of the power supply
3.The main power supply's SATA 15PIN Male is connected with the PSU's SATA 15Pin Female. And the secondary power supply's 24PIN Male is connected with the PSU's 24Pin female
4.EASY SET-UP with a SATA 15pin MOLEX main power connector and a 24-pin ATX connector from the new source
5.Plug and play simplicity manages additional power for video cards, hard drives and cooling fans