First trip on the ice this year turned my m1 flasher on and it won’t mark bottom no or anything no matter how much I adjust the gain any suggestions on what the problem could be
Make sure you are using the proper Depth Range for the water that you are fishing. Try different depth ranges until you start to mark the bottom.
Also the obvious, check your connection at the back of the unit.
Found out that the battery was faulty charger said it was fully charged but when I took the battery out it had purple liquid all over the strap and when I connected it to the wall charger and turned on all worked fine, ordered a new battery thanks for all the help