My Cat is 3 years old on its third 1440…..one I paid to get fixed, the last one was a month out of warranty but Lowrance paid to fix it…….my opinion the 1440 is JUNK……… Here is the master reset sequence, but probably wont help with your symptoms……. 1. Turn unit OFF – Press and hold the up arrow key. 2. Press power, unit will enter production test mode. 3. Press PWR/clear key 6 times. 4. press MENU DOWN and unit will shut off. BAM