Question about Garmin Forerunner 305 GPS Receiver

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Wont turn on

How did you find the button if it was hidden?

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  • thongdee Jun 03, 2008

    wont turn on ... please help

  • mjsruns42K Sep 11, 2008

    Garmin forerunner 305 wont turn on and does not respond in charging unit

  • smee again Sep 27, 2008

    will not turn on, as soon a connected to charger message states charging is complete, when disconnect for docking base forerunner will not switch on, place back on docking base and all works ok only while it is on the base.

  • melwarn Dec 05, 2008

    Garmin 305 doesn't turn on, and doesn't even indicate that it's charging when in the dock. I've wiped off the contacts on both the charger and the unit, and sometimes it beeps at me, attempts to turn on, but then goes blank again. What to do??

  • sub4 Dec 21, 2008

    My 305 was working fine.  Last night I charged it over night.  When I turned it on for the start of my run this morning, pressing the on switch had no effect.  It's dead.   Tried recharging, linking to computer - nothing.  completely dead.


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I faced the same problem.
Here is the detailed answer I received from Garmin support. It worked for me!

Please put the 305 on to charge. If the screen is blank, press and hold the Mode button and then press the Lap/reset button as well and hold them both for 2 or 3 seconds. After a few seconds you should see the "battery charging in progress" message. Then leave it to charge for 30 mins. While it is charging, download your training history to your PC.

Once it has charged for a while. Remove it from the charger and switch the unit off.

Press and hold the Mode button and then press the Lap/reset button as well and hold them both for 2 or 3 seconds.

Then press and hold the Mode button again and this time also press and hold the Power button. The unit should switch on and have a message on the screen saying ?Do you really wish to erase all user data?. Select YES and press enter. The unit will reboot and ask you some questions including if you have a heart rate and cadence sensor.

I then asked them again:

Before I do the 2nd step which resets the data, will it erase only the training data (tracks etc.), or also all the other user data like profile and such?
If yes, are these can be backed up too?

Why is the complete reset required if the Edge is back to life? Do you suspect some data corruption or inconsistency?

And they replied:

The complete reset is required because this could occur again in a few days time. The complete reset will wipe everything including history, workouts, courses, user profile, data field settings and almanac data.

The first time you connect the GPS to your PC after doing the reset you will get a message saying that the profile on the device is different from the profile in the program. You will need to choose to keep the profile in the program which will then transfer your user profile back into the GPS from Training Center.

Posted on Dec 28, 2008

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Will not turn on

Posted on May 31, 2008

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