NUC Won't Start

NUC will no longer start.  It's been running fine for months.  Now it won't start.  When power button is pressed it powers up for about 1 second and then right back off.

Removed WiFi / Bluetooth, module, and SSD.

Removed each of the DIMM's (tried each individually).

Tried BIOS reset.

Tried CMOS battery disconnect / reconnect.

Still won't start.  Shuts off after about 1 second.

Please help.  Do I need to RMA?

Model: DC3217IYE

Thanks