I have used my Garmin GPSMap 172C for a few months now. The display starting getting weak on my boat. Today I plugged it to my AC converter and adapter at home. The keys light up but the display is completely dark. What should I do?
Thanks for the help
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Degaussing is not something that ever needs to be done on this device.
Degaussing is a term that I learned many years ago - it was a process performed periodically on early CRT (cathode ray tube) displays (such as a TV). Over time, CRT displays would build up magnetic charges that would cause the image to become distorted. A degaussing wand would be connected to an AC outlet and then brought very close to the display and gradually withdrawn. This would neutralize the magnetic charges on the display - and the resulting distortion. Years later, manufacturers incorporated a degaussing coil inside the display's cabinet that did the same job as the degaussing wand - thereby making the wand obsolete.
The GPSMap 172 has an LCD display that requires an electrical charge to create an image on the display. Unlike a traditional CRT type displays, an LCD (or LED for that matter) display is unaffected by magnets / magentism. Hold a magnet near a non-CRT type display to see for yourself. A magnet held near a CRT display however will distort the image more as it gets closer to the display. Caution: Doing this may cause PERMANENT damage to the CRT display. This is why many home theater speaker systems touted that fact that they were "magnetically shielded" so that they would not distort the images on the CRT display.
WAAS is a seperate service from GPS. It provides GPS corrections so if you can not get WAAS there is no big problems. you unit just wont be as accurate as normal. WAAS only is for North America and EGNOS for Europe. You may want to turn WAAS off for now. I suggest trying a update for the unit. You will need a memory card and Garmin USB programmer. Then just go to garmins site to get the latest update. If you need a USB programmer feel free to Contact GPSCity.ca or GPSCity.com. They are the leading experts in Garmin GPS.
hi.. when the unit is on try to press and hold the reset button for 10
seconds and then release if this will not work charge the unit for 3 to
4 hours using a wall adapter and if still not work try to check if
there is a latest firmware update for the gps then download it.