Ab350 gaming motherboard problem

[bengreen217]

When i built the pc core without the case it booted up fine. When i screw the motherboard into place in my s340 case it doesnt run at all. Not even the fans are spinning. I bought all these parts on amazon. Any help?

 

[GhislainG]

If it works outside of the case then make sure only the required mounting posts for your motherboard are installed.