On January 8, 2019, Hubble entered a partial safe mode following suspected hardware problems in its most advanced instrument, the Wide Field Camera 3 instrument. NASA later reported that the cause of the safe mode within the instrument was a detection of voltage levels out of a defined range. On January 15, 2019, NASA said the cause of the failure was a software problem. Engineering data within the telemetry circuits were not accurate. In addition, all other telemetry within those circuits also contained erroneous values indicating that this was a telemetry issue and not a power supply issue. After resetting the telemetry circuits and associated boards the instrument began functioning again. On January 17, 2019, the device was returned to normal operation and on the same day it completed its first science observations.
On January 8 2019 Hubble entered a partial safe mode following suspected hardware problems in its most advanced instrument the Wide Field Camera 3 instrument NASA later reported that the cause of the safe mode within the instrument was a detection of voltage levels out of a defined range On January 15 2019 NASA said the cause of the failure was a software problem Engineering data within the telemetry circuits were not accurate In addition all other telemetry within those circuits also contained erroneous values indicating that this was a telemetry issue and not a power supply issue After resetting the telemetry circuits and associated boards the instrument began functioning again On January 17 2019 the device was returned to normal operation and on the same day it completed its first science observations