The LSC machine isn't any better, and now c1sus is showing the same symptoms. Lame.
The link lights on the c1lsc I/O chassis and on the fiber timing system are the same as all other systems. On the timing card in the chassis, the light above the fibers was solid-on, and the light below blinks at 1pps.
Koji and I power-cycled both the lsc I/O chassis, and the computer, including removing the power cables (after softly shutting down) so there was seriously no power. Upon plugging back in and turning everything on, no change to the timing status. It was after this reboot that the c1sus machine also started exhibiting symptoms.