It almost seems like the unit is trying to link up to the sub.
The white indicator is usually when you're syncing up the subwoofer.
Try pressing the ID SET button on the back of the subwoofer, and re-sync the sub to see if that fixes the issue. Instructions are found on page 20 of the manual.
My Samsung Blu Ray 8200 Soundbar has refused to come on today and the only thing that is lit up is the power button which is flashing red and white. Nothing else works so the problem seems quite terminal. Any ideas?