This problem was solved by replacing a fuse holder which had broken and
pulled apart. I found it behind the dashboard in a maze of wires.

Doug wrote:
What is the model number? The shop I work for still services these on a
parts availability basis. Some models they longer accept.
Doug K7ABX
"Wm. E. Fletcher" wrote in message
...

14 yr. old Impulse combined fish finder, depth sounder and Loran unit
kept turning itself off after I would start it.. After several cycles
of this, it emitted a loud squealing noise which only quit when I
clicked the off button. Now it will not start at all. Has ;it breathed
it's last breath.. If so ,can I replace the unit and use the same
transducer which is on the bottom of the boat. I would have to haul the
boat to repair it. Is there a chance that the old transducer can be used
with a new unit?

The company has gone out of business or merged but I don;t know where
or when. Thank you Bill Fletcher