Not turning on after replacing motherboard

[Multipack]

Is it toward the bottom right corner? If yes, its the standby light. You need to double check the front panel connectors are in the correct place, as the power on button sounds like it isnt working on your case.

If you have a manual, check the part that says System panel connector (20-8 pin PANEL)). If you dont, look at manual here and make sure they are connected correctly http://dlcdnet.asus.com/pub/ASUS/mb/SocketAM3+/M5A97_LE_R2.0/E8047_M5A97_LE_R20_V2_WEB.pdf?_ga=1.19564415.636118347.1475534542

 

[Multipack]

This part

 

[lukemantini]

and the psu right