Re-Home Turret QTN 250msy Nexus 640T

Hi Guys,
I got this alarm on switch on this morning.
"378 Battery Malfunction (Turret)"


So I managed to change the battery in the MR2J drive after watching a video of someone doing similar.
Power on when changed.

I need the find the procedure for re-homing the turret.

If anyone has it or could do a step by step guide I'd be very grateful.

Thanks in advance.

Mark.

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