this is a fiber optic cable that is a light source for a CCD camera, my first thought was that a cooling fan may have gone out but that is not the case, little baffled by what the purpose of the "plate" is between the bundles of fibers and why only one side at the light source end degraded like this;
Known bad unit fiber-optic from HSP1 #2.jpg fiber-optic from HSP1.jpg
known good unit (secondary light source)
fiber-optic from HSP1 #3.jpgfiber-optic from HSP1 #4.jpg