An awesome student from our education program made this wiki. It is not managed by iFixit staff.
Garmin Dezl 760LMT Troubleshooting
- Screen Doesn’t Turn On
- Touchscreen Not Responding
- No Audio or Distorted Audio
- Garmin Doesn’t Hear Voice Commands
- Garmin Doesn’t Get GPS Signal
- Garmin Won’t Recognize Devices Through Bluetooth
- Garmin Won’t Read An SD card
The Garmin’s screen does not appear to be working after the power button is pressed or held down.
If your Garmin’s screen does not turn on, plug its charging cable into the micro USB slot, located at the bottom of the device. Plug the other end of the charging cable into your car’s cigarette lighter, press the power button, and wait 15 seconds. If the screen still does not turn on, check both ends of the charging cable and make sure they are securely attached and not loose. Make sure the cable is not stripped or damaged.
Try plugging the Garmin into your computer using the USB cable that came with it and check for any activity. The Garmin should recognize that it is connected to a power source and begin charging the battery. If it turns off as soon as it is unplugged, the batteries may be unable to hold a charge and need to be replaced. We have a guide for this here. If the device won’t turn on after replacing the battery, the motherboard may be damaged and unable to start the Garmin. In this case, it should be replaced using this guide.
If the Garmin charges and functions properly after this step, the car charging cable is likely damaged and should be replaced.
The touchscreen buttons do not respond properly or don’t work at all.
If you attempt to press a button on the touchscreen and instead a nearby one is pressed, the screen may need to be recalibrated. Start with the Garmin powered off and disconnected from power. Touch and hold the upper left hand corner of the touchscreen when in the landscape position. Power the device on. Release the power button when the screen turns on but continue to apply pressure to the screen. Release the touchscreen when it changes and "Touch Dot" or "Press Dot" appears. Accurately touch the dots as they appear and change locations. Touch OK when "Calibration Complete" appears. Your device will be properly calibrated.
If the screen is not responding to touch at all, then attempt to use a stylus to press buttons. Additionally, if you are wearing gloves, attempt to use the buttons with your fingers without gloves on. If neither of these work, the screen may need to be replaced.
There are no sounds, or unexpected and incorrect sounds are coming from your Garmin's speaker.
Check to see if the volume is turned down or off. If the voice guidance system is not working, check to see if has been disabled in the menu. If the volume has been turned on and the speaker still fails to function properly, you may need to replace your speaker.
Your Garmin doesn’t respond to the wakeup phrase or the default voice commands.
The Wakeup Phrase can be set in Apps > Voice Command > Customize Phrase. Make sure that the phrase you are speaking matches the one that was set. If there are any background noises, try to lower their volume. Background noises may prevent the voice recognition from hearing the phrase.
If the Garmin still does not respond to voice commands, it may have a dead microphone. To replace the microphone, you'll need to replace the motherboard.
Your Garmin is not receiving any satellite signal after start up.
You may be located in an area that prevents the Garmin from properly communicating with the satellite navigation. Try to test the signal in a populated area with few clouds or storms overhead. If the device still doesn’t get signal, the wireless receiver may be damaged and unable to function.
Your Garmin is not picking up Bluetooth signal or isn’t discoverable by your other Bluetooth devices.
If the Garmin is unable to connect to a device, the first step is to open the device settings and find the Bluetooth settings. Once in the Bluetooth settings, turn Bluetooth off and back on. If the Garmin still doesn’t detect or recognize an external device, turn it off and on again. If the device is still not being detected, the Bluetooth receiver may be faulty. It can only be replaced by replacing the entire motherboard.
You inserted an SD card into your Garmin but can’t access any of the files on it.
Make sure that the SD card is the right size for the device. If it is the correct type and it still doesn’t work, your SD card slot may be dirty. Clean the slot out gently with a q-tip that has been dipped in rubbing alcohol, making sure there are no other obstructions before inserting the SD card.
If debris has been cleared and the SD card is the correct size, but files still cannot be read, then the SD card slot may be broken or damaged. As it is attached to the Garmin's motherboard, the only way to replace it is to replace the entire motherboard. We have a helpful guide for this here.