Background: In February 2007, the fourth and last satellite of the BeiDou-1 system, BeiDou-1D (sometimes called BeiDou-2A, serving as a backup satellite), was sent up into space. It was reported that the satellite had suffered from a control system malfunction but was then fully restored.
Question: What happened to the BeiDou-1D satellite that needed to be repaired?
Answer:<extra_id_0>.
<extra_id_0> a control system malfunction<extra_id_1>