Question about Garmin Nuvi 660 GPS Receiver

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My Garmin nuvi 660 only stays on the "Loading Maps" when I turn it on. Tried resetting and holding down the On button until the Pre-boot mode setting goes off, still stays on "Loading Maps"

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  • Garmin Master
  • 2,130 Answers

This is caused by a corrupted file on the Nuvi. To fix this issue, a special version of firmware has to be flashed on the unit, telling it to not look for the corrupted files. The unit will boot normally, then using the PC, the corrupted files need to be replaced and then finally the special firmware needs to be replaced (reflashed) with a standard firmware.

I have done this numerouse times.

- Jim
SHARCNET-USA

Posted on Mar 28, 2011

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1 Answer

Garmin nuvi 660 goes into pre-boot mode, then loading, then loading software, then back to pre-boot mode and keeps looping through the 3 steps, and it won't shut down


There is a transient diode across the switch. Most likely it's shorted, casuing the symptom as if you were holding down the power switch and never letting go. I've seen and repaired this before.


- Jim
SHARCNET-USA

Sep 11, 2010 | Garmin Nuvi 660 GPS Receiver

1 Answer

My garmin nuvi 260 will not go past the loading maps screen


There is a corrupt or missing file associated with the mapping thats causing it to lock up. When that file is missing, your Nuvi never gets to the routine for communicating with your PC. That's why your PC can't detect it.

I've fixed this problem before. The unit must be placed in PRE-BOOT mode, forcing Windows to recognize it and then using a specific program, reflash the firmware to an older version that doesn't care that the file is missing. The unit will then boot properly and you'll regain detection to the unit in Windows. Then you can repair/replace the missing files and then reflash back to the latest firmware.

Yes, its a pain and not an easy process to the novice.

- Jim
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Sep 02, 2009 | Garmin Nuvi 660 GPS Receiver

1 Answer

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In case it is a software problem try this and see if it will fix it......follow these steps.
1. Power off the unit.
2. HOLD down the power button and you will see "Pre Boot Mode" appear on the lower part of the display. KEEP HOLDING the power button down and the display will flicker, do this until the pre boot mode message disappears. This seems to take a long time (60 seconds at least).
3. Once the pre boot mode message disappears release the power button and your device will perform some activites to try recover from the problem.

Jan 17, 2009 | Garmin Nuvi 660 GPS Receiver

1 Answer

No voice directions


In case it is a software problem try this and see if it will fix it....Try this and see if it fixes your problem...follow these steps.
1. Power off the unit.
2. HOLD down the power button and you will see "Pre Boot Mode" appear on the lower part of the display. KEEP HOLDING the power button down and the display will flicker, do this until the pre boot mode message disappears. This seems to take a long time (60 seconds at least).
3. Once the pre boot mode message disappears release the power button and your device will perform some activites to try recover from the problem.

Jan 03, 2009 | Garmin Nuvi 660 GPS Receiver

1 Answer

Stuck with pre boot mode on screen


"Will not turn off, stuck on with display saying 'pre boot mode'. Does nothing but this - please help!"

This indicates that the on/off switch is shorted out. You can duplicate this problem by taking a working Nuvi and keep holding down the on/off button when turning it on. It will stay in this mode until you let off on the power on/off button.

- Jim

Jun 07, 2008 | Garmin Nuvi 660 GPS Receiver

1 Answer

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Try this and see if it fixes your problem...first disable bluetooth then follow these steps.
1. Power off the unit.
2. HOLD down the power button and you will see "Pre Boot Mode" appear on the lower part of the display. KEEP HOLDING the power button down and the display will flicker, do this until the pre boot mode message disappears. This seems to take a long time (60 seconds at least).
3. Once the pre boot mode message disappears release the power button and your device will perform some activites to recover from the problem.

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Garmin nuvi 660 personal travel asistant


Are you running this unit while it is charging? Does the Nuvi 660 have a sufficient charge?

Try to do a hard reset on the unit.

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I've tried master resets and it does not fix the problem. Only fix is to buy a $30 garmin reciever extension and attach it to the side of your flip up receiver. This is the only fix.

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