SOURCE: broken garmin screen
Like original poster, I've got a dent on my Garmin C320 screen - could see everything, but touch feature stopped working.
Just finished swapping the screen with the one from my old Dell Axim X3 PDA. Now GPS works again! It seems that older units were using industry-standard LCD that could be easily replaced. Not sure about newer Nuvi systems...
SOURCE: My Garmin 205 shows "system
Hey!
I just got an answer from Garmin Support Germany and they
sent me an file which fixed the problem. Just download
http://e-trex.info/fw/nuvi/2x5/nuvi205_085101000280en.rar
It contains a "Updater.exe" and a file called "085100010270.rgn".
Follow the following steps and you should have your nüvi back.
Firstly
connect your broken nüvi. Then drag and drop the 085100010270.rgn on
the updater.exe. Choose USB as a connection and it should put an old
firmware back on your device.
I hope I was able to help you!
Alex
SOURCE: Broken Garmin GPS Nuvi 300 Touch Screen
I know of this site where your screen can be replaced.
http://www.sharc.net/nuvi_LCD_repair.htm
SOURCE: touch screen won't calibrate on garmin 2720 gps
The touch screen is a 4 wire resistive type made up of several layers. A thin plastic layer, a micro thin metal layer, microdots for insulators, another ultra thin metal layer, and a final plastic layer. All of these layers amount to the thickness of a sheet of paper. This whole stack is bonded to a thin sheet of glass and placed over the actual TFT display.
It's amazing that you can see through all these layers and only lose 20% of the light. What's not so amazing is that those thin metal layers are prone to damage. I've seen several with no apparent damage that didn't work, and several with visible scratches or cuts that worked fine.
I usually start by installing (or reinstalling) v7.2 firmware and then attempt to recalibrate the screen, sometimes that works. Next I would try re-seating the 4 conductor touch screen pigtail in it's ZIF socket nestled between the big white wires on the display assembly. The last resort is to buy a broken 2600 or 2700 series Garmin and salvage the touch screen. You could send it to Garmin for a flat $250, but that makes no sense at all.
If you get another screen (Garmin won't sell you one), Here's how to replace it:
Remove the six screw holding the case together.
Split the cases and pull the patch antenna out of it's slot.
Remove the four silver screws holding the display assembly into the front bezel.
Unhook the small ribbon cable that goes to the infrared receiver under the red lens.
Pull the display assembly out of the front bezel. It won't come all the way out because of cables.
Use a razor to cut the plastic tape holding the touch screen bracket to the TFT display.
Unlatch the 4 conductor ribbon from the ZIF connector nestled between the 2 big white wires.
Use a penknife to unbend the metal tabs keeping the touch screen from coming loose. I usually just do the two by the IR receiver.
When you reassemble, don't get frustrated with the gaskets, they're tricky but it can be done. Tom
SOURCE: Touch screen not working on garmin nuvi 670
Has this been solved? Hold power switch to right for about 30 seconds then follow on screen help to recalibrate screens
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