![motherboard - How did HP made their power on bottom work with no VSB (standby) on their pro 290 and to make a 24pin ATX psu work with it? - Super User motherboard - How did HP made their power on bottom work with no VSB (standby) on their pro 290 and to make a 24pin ATX psu work with it? - Super User](https://i.stack.imgur.com/cb3lr.png)
motherboard - How did HP made their power on bottom work with no VSB (standby) on their pro 290 and to make a 24pin ATX psu work with it? - Super User
Isn't the power supply supposed to show any sign of life when the power switch on the supply itself is turned on? - Quora
![Amazon.com: Optimal Shop 24 Pin Main Second Dual PSU ATX Power Supply Motherboard Adapter Cable : Electronics Amazon.com: Optimal Shop 24 Pin Main Second Dual PSU ATX Power Supply Motherboard Adapter Cable : Electronics](https://m.media-amazon.com/images/I/816PGAhVarL._AC_UF894,1000_QL80_.jpg)