Power Problem Building New System w/ ASUS H97i-PLUS Motherboard

[saclarkdoc]

I stripped an old chassis and am rebuilding around H97i-PLUS MOB (PSU is Solid Gear FLEX/Mini ITX 320W #SDGR-FLEX320 and CPU is i3-4160).

When MOB & PSU are connected, the MOB Standby Power LED lights up. However, when 10-1 pin F_PANEL POWER BUTTON pins are shorted together, the MOB does NOT turn ON.

Please suggest next steps to troubleshoot. Thanks.

saclarkdoc