electronic slumber
 n.— «Meanwhile, the latest gyroscope failure forced the space telescope into an electronic slumber called a “safe mode.” The operating mode ensures that the telescope continues to generate electricity for its scientific equipment and flight controls, though it is unable to point at celestial targets.» —“Space Chronicle: Failed gyroscope puts Hubble into slumber” by Mark Carreau Houston Chronicle (Texas) Nov. 15, 1999. (source: Double-Tongued Dictionary)

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