My 997 has down sensor problem!
If I turn on my 997 in the water, down parameters(depth, image, etc) are good.
But after 5 to 10 sec, these down parameters are gone(depth shows 1.5ft and down image are none!)
And after rebooting, above phenomena is recured over and over.
Side imaging and temperature signals are good, only down signal is problem.
Please help me~~~