Hey guys. Got out on the water Saturday for the first time in too long(5 months). Everything was going good, meaning everything was running good (not catching much) but working. About the fifth time I turned my 858 on up front (tm mount) my DI was working but graph was not. I turned it off and on several more times but all I got was DI. Sonar showed a light line at surface and the rest was just white. No bottom or anything in between. All of the read outs were fine and was giving fine DI views. Any suggestions? I played with some of the settings, but never got anything out of it. Thanks for any help.