I think most of the solar wind instruments are still working as well as they did when built , the camera's were turned off a long time ago ( think they started to suffer faults and it wasn't a priority to write software to overcome the problems ) and I'd think couldn't be switched back on again.
The problem now is that due to the "green" movement in America NASA will never be able to put another satellite like this into space , I think the Us Military still launch spy satellites with nuclear reactors from time to time but NASA hasn't been allowed to launch a reactor for well over 10 years now.
Bit much of the greens to stop reactors as by far and away the best engine for any manned mission to Mars or the outer planets is a nuclear rocket ( they pump gas into a reactor and that gives them the thrust , amazingly the greens claim this will pollute space.... erm the radiation a nuc engine puts out is like pee'ing in the ocean compared to solar radiation !! )