Question about Garmin nuvi 780 GPS

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Screen is black

My Garmin Nuvi 780 had been working fine for a week, and just yesterday when taken off the window mount while still on the screen went black. When try to turn it back on the screen remains black, it will make noises if I touch the screen when turned on. Help! is there anything I can do? I'm afraid to do anything, I don't want to hurt it..

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  • Anonymous Jan 05, 2009

    same problem but, mine doesnt make any any sounds

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Most likely you will need to do a re-set. Just slide the power switch to the left for 8 seconds. It should then re-boot. It this doesn't work, you've got more serious problems.

Posted on Jan 10, 2009

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I have no sound on my garmin nuvi 780. i've hardly used it...


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1 Answer

I have a Garmin Nuvi 660 and the suction cup fell off the inside of the windshield and broke the screen on the GPS. I believe it is only the touch screen portion because the picture looks and acts fine. ...


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If the unit is out of warranty, the manufacturer will not sell you a replacement screen. You can find them on eBay, but unless you know how to take the Nuvi apart, you face damaging the unit further.

If the touch screen is bad, the Nuvi will not recognize any presses on the screen. Having worked on many of these units, there is really nothing to go bad on a touch screen unless its physically damaged or has become disconnected from being dropped. If it appears that the glass is cracked, then it is the LCD display that is bad. The touch screen is a clear film layer that lays over the LCD display.

I would strongly suggest that you purchase a Garmin friction mount and no longer use the window mount. With a friction mount, your Nuvi will not fall and the friction mount is legal in all 50 states, whereas a window mount may not be.

- Jim

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