It switches its self on and screen flashes , turn it off 5 seconds later its back on .
Firstly check you connections to your battery or any switches in line are secure and not corroded or damaged. If there are any loose connections then this could possibly be a reason, although unlikely, but its good to check those first anyway.
Next make sure the transducer/power cord is inserted fully into the back of the display unit. Again check for corrosion and good connection here.
The most likely porblem however is a sticky power button. If these are not freely engaging and retracting when pushed, the switch could be arcing causing the unit to turn itself on and off intermittently. You either need to pull the display unit apart and try to remedy the problem (if it is out of warranty and you are happy to do that yourself) or get a professional technician or Lowrance service centre (if still under warranty) to attempt the fix.
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