Back in November, NASA's second longest-running spacecraft Voyager I began sending data that made no sense whatsoever. Instead of information about its status and what various sensors were recording, all the scientists got was ato study the gas planets, flying past Jupiter and then Saturn, before heading off out into the unknown.
Since that chip stored instructions for how the FDS should communicate with the TMU, its loss meant the latter had no way to work properly. The two Voyager spacecraft were some of the first ever to use volatile memory to store data, so it's remarkable that they've lasted as long as they have. But with the problem identified, a solution could be developed and it was about essentially figuring out which code had been lost and then resending it to be stored on another memory chip.
At some point in the next few years, the RTG will no longer have sufficient radioactivity to power the spacecraft's transmitter and it will fall silent for good. By 2036, even if it does somehow continue to work, Voyager I will be too far for NASA's