when powering the gpsmap 276cx, garmin logo show on then as soon as copyright screen comes up . the screen goes black . buttons are working can hear them when pressing. but no thing on the screen .
it was working fine until I transferred a custom map on internal memory, it bricked.
now it can not be detected by the computer. any ideas to cure that or anyway to get that detected on the computer so I can delete the custom map.
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