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My astro 220 has not been working right for about a month now. Its started dropping collars at about 200 yards and woulndnt pick them back up until the dog was touching you. I used it in real bad weather yesterday and the screen froze up and none of the buttons work it would stay on the dog screen but wont allow you to look at the map but it was tracking dogs up to a mile sometimes more you just couldnt look at the map to tell where they were. Then it wouldnt turn back on and I brought it home and messed with it got it back on but no buttons and the screens still froze. This morning it wont turn on but the screen blinks. Time for a new one you think?

If you want to reset it

try to press the Map, The enter and the power button down all together with the unit off.

it will delete your dogs, and Waypoints so You'll need to re attach the dogs.

If you are not tracking past 200 yards I don't think this will fix it. That is normally causes from a broken wire.

Buddy I tried that and its still wont turn on.

i had same problem as you last year on a 220 garmin replace it with a new one