I have a ST50 fluxgate compass
on my Aquanaut Drifter. It appears not to work
. At least I can't get it to do anything useful. The manual says it should be re-calibrated, which I have attempted. The manual says to press and hold the LOCK button. Unfortunately instead of going into "recalibrate mode" it displays the messages L3 (illumination) then P13 (?) followed by dH4 (?).
Can anyone suggest:
What may be wrong?
What need to be replaced?