GPS, Garmin 850 touchscreen goes crazy

I have a Garmin 850 GPS (with European maps installed) which has served me well for around 4 years, the only issue being that the device that mounts it to the windshield, the rubber suction cup, well, loses suction and it falls off from time to time, and for whatever reason, it does this more so in my new 2103 Sonata (angle of the windshield maybe?).

It has survived these falls without any noticeable damaged, until last week that is, this time the lower left hand corner of the touchscreen was failing to work, tried turning on and off etc, all to no avail, I was residing to the fact that I might have to get a new one, then it dawned on me that I could probably still get by, by using the voice recognition, but this was not ideal, I then tried a ‘pre-boot reset’ and recalibration and it is now working fine again!

This is what I did

  1. Turn the GPS off
  2. Remove battery
  3. Press and hold the touchscreen then put the battery back in
  4. The unit will power on and go into pre-boot mode. Continue holding the screen until pre-boot goes away and the progress bar appears then release the screen, this can take around 1 minute.
  5. Now the calibration will start, two intersecting lines should display on the screen along with the message: Press Dot
  6. Follow the rest of the on screen prompts to complete the screen recalibration

That’s it.


About hedscratchers

A UK ex-pat now living in the USA.
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