I'd try wiggling the wires from the hatch to the roof first. Put it in reverse with the e-brake on first with the key on(obviously), watch the screen while you wiggle away. Might be a waste of time but it's free.
The only other complete guesses are the yellow fuse holder came loose in the fuse box(lh dash). Or maybe a plug on the back of the radio is coming loose?
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View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)