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?
2) Is the USB port live and functional? With a known good cable and external device, does it come up? (Might combine with (1) if you can get the device + cable to come up on another computer or USB port. If it works on another system, do you get any tone or indication from your computer that something has been plugged in? Go to the USB devices page - it's in Hardware Manager in Windows, and check that the port is being seen. If you're getting a not-in-use or warning icon for the port, you may need to go update the driver.
3) If you have the documentation, or if your GPS still has a manual (or an external charger), see how much current the device draws on the USB (it should be in milli-amps or Amps (mA or A). If it's substantial, you could be overloading the USB port with the power draw. Try plugging into an external, powered USB hub that is attached to your computer. That may do the trick.

Good Luck!

Nov 09, 2015 | GPS

1 Answer

Why do you replace battery in gps my gps keeps shutting even with car charrger plugged in

Even with a dead battery....even with a battery removed, the unit should still operate normally when connected to an external power source, like a DC car charger. Common problem with the Nuvi 1100, 1200, 1300 & 1400 series is a loose USB port. If the port has broken away from the PC board, you will not be able to charge the internal battery and the unit will give you constant pop up notices that it is powering down or it may not come on at all. We've repaired hundreds of these units with defective USB ports. Please see this link for more info:

SHARCNET USA Out of Warranty GPS Digital Camera Repair

May 24, 2014 | Garmin nuvi 1200 Car GPS Receiver

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Where is the usb port on the unit to plug into my computer? dont see one

You have to have a mini usb to usb connecter. the small port on the back, the charging port acts as the usb port. unfortunatly they don't come with one.

May 12, 2010 | Garmin nuvi 260W GPS Receiver

1 Answer

Why can't my PC detect Garmin 255W when I plug it via USB?

First makre sure that the usb is working. Just plug anythign into the usb port and if it detect it we know that is working.

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.

Apr 03, 2010 | Garmin nuvi 255W GPS Receiver

1 Answer

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.

The rear mini-USB port is defective, making the unit think its connected to a PC. The port needs to be resoldered or replaced. Please see this link:

See the section about the PC icon.

- Jim

Sep 23, 2009 | Garmin nuvi 200W GPS Receiver

1 Answer

Computer does not recognize it

assuming your using a windows xp or 2000 os, try another cable if you have one..turn the gps off, plug in the usb cord and restart the gps. if that fails, if the cable is connected to a port on the front of the computer,move the usb cable to a rear port on the computer and try the previous way i just explained.

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)

good luck

Aug 03, 2009 | Magellan Maestro 4040 GPS Receiver

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Garmin 305 will not send info. to my computer

It sounds like the PC has possibly lost the driver for the Gamin. Back up your files on the PC and reinstall software.

Mar 24, 2009 | Garmin Forerunner 305 GPS Receiver

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Magellan explorist 600 gps with windows xp

It is more than likely a defective USB cable. I am on my third cable. They don't stand up to the abuse.

Apr 03, 2008 | Magellan eXplorist 600 GPS Receiver

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Usb port trouble

You may have to run the program with administratve rights. (I had some trouble after getting a new laptop with Vista, that fixed it).
It may also be a faulty port on your gps, or a breakage in the usb cable... Or it may be broken...

Dec 15, 2007 | Garmin eTrex GPS Receiver

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