A solar storm semi-nuked the Intelsat's Galaxy 15 satellite last month, enough so that it's not talking to Earth but it also isn't completely dead. So now it's wandering around the geostationary arc still broadcasting and about to mess up other satellites in its way:
"In what industry officials called an unprecedented event, Intelsat's Galaxy 15 communications satellite has remained fully "on," with its C-band telecommunications payload still functioning even as it has left its assigned orbital slot of 133 degrees west longitude 36,000 kilometers over the equator. ... The first satellite likely to face signal interference problems from the adrift Galaxy 15 is the AMC-11 C-band satellite owned by SES of Luxembourg and stationed at 131 degrees west, just two degrees away from Galaxy 15's starting position."If nothing can be done to stop it, Galaxy 15 will continue beyond AMC-11 and go on to torture other nearby satellites until it stops pointing at Earth...eventually. No one knows when that will happen, so Galaxy 15 could be causing havoc for quite awhile. When it does finally die it will join about 160 other so-called "zombiesats" that are dead but still shuffle around the planet aimlessly searching for brains. Galaxy 15 is near and dear to my heart because it was one of the satellites that carried Syfy's signal. So long old berserk, crazy friend... "Out-of-control satellite threatens spacecraft"