Question about Garmin StreetPilot c340 GPS Receiver

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USB port defective

GPS USB Port overloads PC or Laptop USB ports.

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Have you tried another USB cable? As long as it's got the same mini-USB connector, they are universal. Most digital cameras use these same cables, as well as many MP3 players and other handheld electronics devices.

If this doesn't fix it, most likely, it's a defective USB interface chip in the unit... and will need to be serviced. GARMIN 1-800-800-1020 (USA).

Fortunately, the USB ports on PC's are protected. When an overload is detected (> 500mA), the USB controller shuts down the offending port. This port can then be restored manually through the USB disgnostics, or simply shutting the PC down, and restarting it.

Posted on May 04, 2008

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Device will not work with 3.5mm usb connection. how do i fix


Depends on what 'will not work' means.
Basics first:
1) Is the cable good - plug a USB device that you know works to your computer with the cable. Can you see that device from your desktop?
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Now with the GPS plug the usb cable into the port you tested then plug the gps on the other end. Watch your screen (PC) and see if it detects the gps. It should say one of two things. One will be device discovered Garmin GPS (something along that line) or it may show USB storage device. You can plug it in and look under my computer for these if you missed what it said. Some versions of windows are better than others at detecting whats connected. And some hardware is better than other at detecting something on a connected usb cable.

You should also plug the cable into a differant port if you had left it connected and were getting this problem. And you should try plugging both into a differant computer if you can. Doing these can tell you if the problem is the gps, the cable the port or the computer itself. Usually just changing the port is all it takes.

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Unit goes into computer mode when I plug in the car charger lead. I go through the 'loading maps' screen, then the PIN screen, and it defaults to computer mode and I can't get any maps to show.


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if those fail, disconnect all usb devises connected to the pc and restart the computer and try again. (always use a rear port on the pc if you can)

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You may have to run the program with administratve rights. (I had some trouble after getting a new laptop with Vista, that fixed it).
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