Electronics questions.

I have lines in my lowrance LMS 350A what causes this? Can I do something to clear them up? Or is it time to replace?:confused:

good luck getting help on an older Lowrance.. My screen went out on a ff/chartplotter i bought about 6 or 7 yrs ago and lowrance told me they no longer service it. They told me they would send me a coupon for a new lowrance..I told them to keep their coupon because I didn't want another Lowrance if the ain't going to service it in a few years.. Got me a Hummingbird now any very happy with it.

I have 2 lowrance X65's I would let go cheap.

I get lines in my Lowrance 522 anytime I cut my front depthfinder on. I just put up with it because I knew it was just interference from the other unit. Which battery do you have your ff hooked up on, cranking or trolling? Are the lines on the screen when anything else is running (other ff, trolling motor, big motor) and when everything else is cut off?

Thanks for the help. I will try your suggestions. Maybe time to upgrade. 16 years is pretty good. Wish I could find another one that will hook into exsisting lines.