I have an Lowrance x135 that is froze on 60ft. I have tried to reset it but it did not work. Tried the unit on another tranducer but that did not work either.

SOURCE: gps wont pick up satilites

Make sure all the connections at the back of the unit are tight. If it still doesn't respond try a new puck.

SOURCE: Lowrance LCX 28c HD with Navionics HotMaps Premium SD chip. Chip worked fine last fall but when I went to use yesterday the Lowrance would not read the chip.

I had the same problem with my handheld Lowrance Hunt C. After installing the card and locking it in place, I had to slide the card "out" toward the locking mechanism. It barely moves, but worked after that. Whenever I load the card, I now slide it out or wiggle it and it works every time.

SOURCE: lowrance x135 not functioning properly

Had the same issue with another brand. Turned out the transducer cable was picking up noise from other cables (power, trolling mtr. etc). Try moving the transducer cable away from any other cables. I put the cable in a 1/4 " plastic housing up to the point where it was above deck and it stopped all the strange stuff. Not sure about the temp issue??

SOURCE: Our lowrance x135 just quite working Its less than

Here is a manual for it. http://www.lowrance.com/upload/Lowrance/Documents/Manuals/x136df_0151-171_112003.pdf ,

Take it to a major marine outlet, they generally have access to experts who fix this type of equipment