Thread: Garmin Montana 650 Unresponsive touch screen

The touch screen on my recently acquired Garmin Montana 650 goes unresponsive after it's been on for a while (don't know how long it'll go before becoming unresponsive at this point - seems to vary). I have the latest firmware installed (7.60). The GPS will connect up to my PC just fine and will charge, and I can can access the files on both the unit and the SD card. I have hardware reset and recalibrated the screen several times, with and without the SD card inserted - and no change.

Interestingly, when the screen is completely unresponsive, even after a reboot, I can still get to the hardware reset menu by touching the top left of the screen while turning the power on - indicating the touchscreen is actually responsive at that point. I can also get to the 'screen calibration' screen from start up, but can't calibrate the screen at that point as the screen is unresponsive.