PS ON is not output of power supply. It is input. If You want PSU to start You need to connect it to ground. Mistake in here "fries" the PSU.
Ad 2.
In the "classic" specification "Power Good" should have +5V when PSU is confident it provides proper voltage on all outputs. When this output is below or above, the motherboard and OS should quickly take action to flag the PSU is not working properly. Initially it was used for MB to wait with the boot until PG stabilized at +5V.
Ad 3.
The ATX standard states that the +5V SB is 5V in standby mode, so when PSU is connected to power but not "on" started yet. Lets say it supplies the "blinking led" when PC is in standby (making this an awful shortcut as it powers up a lot of other devices to keep memory state).
Disclaimer: basing on the measurements it seems You have mis-ordered the pinout numbers on the male-female plug (so, please cross-check). Not sure if Dell did not implement own "interpretation" of ATX standard, so the information provided may not be accurate.
The only recommended way is to replace the PSU for a know good one especially for a server.
The information provided should be used for DIY activities, not server HW troubleshooting. ATX PSUs are great for LED lighting, phone charging, home automation and that seems to be the case for the mentioned PSU.
f25
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16 Posts
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April 13th, 2020 09:00
Ref Your questions, according to ATX standard.
Ad 1.
PS ON is not output of power supply. It is input. If You want PSU to start You need to connect it to ground. Mistake in here "fries" the PSU.
Ad 2.
In the "classic" specification "Power Good" should have +5V when PSU is confident it provides proper voltage on all outputs. When this output is below or above, the motherboard and OS should quickly take action to flag the PSU is not working properly. Initially it was used for MB to wait with the boot until PG stabilized at +5V.
Ad 3.
The ATX standard states that the +5V SB is 5V in standby mode, so when PSU is connected to power but not "on" started yet. Lets say it supplies the "blinking led" when PC is in standby (making this an awful shortcut as it powers up a lot of other devices to keep memory state).
Disclaimer: basing on the measurements it seems You have mis-ordered the pinout numbers on the male-female plug (so, please cross-check). Not sure if Dell did not implement own "interpretation" of ATX standard, so the information provided may not be accurate.
The only recommended way is to replace the PSU for a know good one especially for a server.
The information provided should be used for DIY activities, not server HW troubleshooting. ATX PSUs are great for LED lighting, phone charging, home automation and that seems to be the case for the mentioned PSU.