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In order to access the unit's internal flash drive, a service firmware needs to be flashed on the unit. This will allow the unit to boot only as a flash drive and a PC will now recognize it. The backup files may now be transferred over to the unit. Then the units firmware must be flashed with the normal factory firmware (v6.3 as of 3/8/16). More info on boot-up issues can be found here:
Your Nuvi has to boot past the Garmin logo to the main screen before it can be recognized by your PC. Is the unit dead? The Nuvi 14xx series is well known for its problem with the rear USB port coming loose. This will prevent the unit from receiving power from the external charger and will prevent the battery from being charged. If the unit goes into a boot-up loop, displaying the Garmin logo then shuts down, this is often caused by corrupted files, such as a map or bad firmware update. See these two links for more info:
Sorry to say but this is a result of a failed firmware or map upgrade. Sometimes a break in the data communication between your GPS and PC can cause a failed upgrade. When you turn on the unit and it just displays the Garmin logo, sometimes in an endless loop, this is a boot problem. The unit can not find the proper files or they are corrupted. More information can be found here: SHARCNET USA Out of Warranty GPS Digital Camera Repair Center
It can not be reset. The unit has to be flashed with a service firmware to access the units flash drive. Then the missing or corrupted files need to be replaced. This is why the unit is crashing on boot-up.
Once the files have been restored then the unit can be reflashed with the factory standard firmware.
The problem you have right now is that the unit can not be found by your PC because its in an endless loop-boot-up and never reaches the main screen to detect that it is connected to a PC.
For more info on boot-up problems, please see this link:
I recommend upgrading the system software of your Garmin 545s. There may not be physical damage to your unit, and it may be completely revitalized by replacing the GPSMAP software with the latest version 5.30 (as of January 7, 2010).
Click on "Download" and choose to save the file to your computer.
Choose a location where you can easily find the file, such as the 'My Documents' folder or 'C:\'.
Once the download is complete, go to the location where you saved the file.
on the downloaded file. This will automatically extract the files to
C:\Garmin and run a program to transfer the software update to an SD
I asked Garmin how to display maps when connecting a 265WT to a PC with a USB cable. Based on the following reply I received from Garmin the answer is you can't. Have you ever updated your software in your Garmin 265WT. Perhaps you were able to display a map with the USB cable connected with an earlier version of the software. Whereas the latest version of the software will not let you display a map with a USB cable connected.
"Thank you for contacting Garmin International.
I will be happy to help you with this. Unfortunately when your unit is connected to a computer you will not be able to use the device. The unit is designed to go into mass storage mode when connected to a computer."
I found the resolution on this site. I removed the face of the unit and hit the reset button on the right side of the unit. I put the faceplate back on. I connected the unit to my laptop via USB port. I downloaded the software for the c5550 from the Garmin site. I installed the base software and the upgrades. I left it connected to the laptop for a few hours to fully charge. I then disconnected it from the laptop and hit the red button to turn the unit on. I received a software update message, when that was done, the unit completely booted up.
see discussion at http://californication.mtbguru.com/2005/11/20/deconstructing-the-garmin-etrex-vista/
Its possible that there's a bad connection at the ribbon cable, but most likely its a bad connection at the edge of the LCD glass panel. I've had two eTrex fail because of this problem.
Don't pay the riduculous price Garmin asks for repair - just buy a new Magellan unit. If you must get a Garmin, go with the high-sensitivity receiver.