Question about Garmin Forerunner 305 GPS Receiver

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My Garmin 305 has stopped working. It is 1 1/2

My Garmin 305 has stopped working. It is 1 1/2 years old and I use it 6 days a week for running. I have tried the soft start and have checked the charge connection with the base. Do I have to send it back to Garmin to have the battery replaced?

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If it won't start, try connecting it to your computer and see if you can get a firmware update to turn it on. Otherwise I would send it into garmin since there aren't replaceable parts for consumers.


Posted on Jul 17, 2009


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Posted on Jan 02, 2017


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My Garmin 305 which I have had for 5 years when locating satellites fills the bar graph up only about 1 centimeter and then resets back to zero and fills up again to about 1 centimeter and resets back to...

I got exactly the same problem last Friday. I could not fix my device yet but the link for the post below has some good tips that may work for your device.

After I ran GPSChipsetTypeG_300 file my device still shows GPS 0.00 version. I have tried many times without sucess.

Good luck!

Aug 05, 2011 | Garmin Forerunner 305 GPS Receiver

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Forerunner 305 GPS Receiver: Is it possible to change the battery in a Garmin F...

Yes you can. Go to the Garmin Website and simply email them asking for the price of the battery and instructions on how to replace your specific model and serial number as they changed in mid year many times.

May 03, 2010 | GPS

1 Answer

Uploading multiple days of runs to Garmin Training Center

Yes it will hold ALL you runs AND keep them seperate. What you need to do at the end of each run just before you turn it off hit and "hold" the Lap button (reset button). It takes a second but you should see it say reset in 3-2-1. Keep holding untill the process is finished. What this does is end your run and saves it in the watch. When you start your watch the next time it will start a new run when you hit start. By doing this it will keep everything sorted when you down load. In the software you will see one enty with a + sign beside it. The first entry you see is the total of the week. If you hit the + you will see each individual run.

Hope this helps.

Mar 18, 2010 | Garmin Forerunner 305 GPS Receiver

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My Garmin forerunner 305 will not turn on.

I have had the same problem. To fix it, I simultaneously hold down the "mode" and "reset" buttons for about 10 seconds. After releasing the buttons I power it up as normal. This has worked both times it has happened, and I got this fix from the Garmin website. My mileage totals are still in the history.

Dec 14, 2008 | Garmin Forerunner 305 GPS Receiver

2 Answers

Edge 305

Try Holding the Lap + Mode, for a few seconds, release and then hit Power button. It worked for me.

Sep 29, 2008 | Garmin Edge 305 GPS Receiver

1 Answer

Opening forerunner 305


I have a problem with my 305 whereby the mode button stopped working so semi pulled mine apart.

If you look at the 305 from the side you can see where the rubber bit covers the buttons. The bottom of the rubber bit is attached to the rear of the forerunner - don't try to detach it - I munted mine a bit detaching it. At the top of the rubber, nearest the face you'll see a small gap. Follow the gap anti clockwise from the power button down to bottom left corner of the face near where the wrist strap pin is. Here you'll see the gap is plastic on plastic on plastic. I believe a thumbnail or similar in here and worked around carefully will let you pry the face off. I stuck my thumbnail in there and got the face to lift 1-2mm before I backed off. Note I didn't go any further than that.

For my problem by the time I had munted the rubber cover and was able to operate the mode button with a paperclip I new it was dead so didn't bother going any further as I could still use the 305 in reduced mode without mode changing.

Aug 29, 2008 | Garmin Forerunner 305 GPS Receiver

1 Answer

Won't turn on...hear the beep, and screen works.

Exact same problem for me on the exact same day (2-sep) as well - freaky! Unit was out of battery and I charged it but that was the last time I managed to get it working - charging it now to see if it makes any diff. Actually with mine I hear the beep and the initial splash screen shows for about 1 sec and then that's it - it seems to go off again. I think it's something to do with the battery as it seems to work when connected to the charger - not a whole lot of good to me!

Aug 28, 2008 | Garmin Forerunner 305 GPS Receiver

1 Answer

Garmin 305

I think that you have got a loose connection on the battery. I had the same problem, took the top off and had a poor connection on one of the battery terminals.

Any jolt would cause it to shut down.

Should be a simple fix if you don't mind going inside!

Jul 05, 2008 | Garmin Forerunner 305 GPS Receiver

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