BJ,
Before you RMA the board you can find low level board tests that run in Code Composer Studio + JTAG on the Spectrum digital website at:
For DDR2 DIMM EVM http://support.spectrumdigital.com/boards/netradimm/revc/
For DDR3 EVM http://support.spectrumdigital.com/boards/netra/revb/
Normally there is a CCS based test case for ethernet that requires a local loopback connector.
Iain