Not at all. You fail to realise that the electronics weren't all in the vacuum of open space, but were inside the cabin.

Electronic components generate a lot of heat, and that heat would have warmed the cabin of the spacecraft. Switch off the electronics and that heat source disappears. That really is elementary physics.

But the real question seems to be why an unpowered spacecraft in sunlight gets cold and not hot, in which case most of the discussion about heating and cooling in a powered up spacecraft seems a little beside the point.

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"The very powerful and the very stupid have one thing in common: They don't alter their views to fit the facts, they alter the facts to fit their views." The Doctor, Doctor Who: The Face of Evil.