Question about Garmin Forerunner 305 GPS Receiver

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No display for my garmin 305, i have it connected to the charger tried reset thingy, it powers on all i see is blank screen with backlight but no display.

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: won't turn on or charge

Press Mode (bottom left side button) and Reset (left front button) simultaneously, let go, then press On (top left side button).

Posted on Aug 06, 2009

  • 84 Answers

SOURCE: My Garmin forerunner 305 recently got immersed in

I have read in some other posts about the unit only working while being plugged into a USB port. My guess is that the battery is in fact shot and the unit will only run off the USB port while plugged in. Submersing in water is not a good idea. On the back of the unit there are some small holes for the speaker. These speakers corrode from sweat and eventually quit.

Posted on Jun 08, 2009

  • 1 Answer

SOURCE: my garmin 305 only operates when connected to

Go to the garmin website and install the firmware update.
http://www8.garmin.com/support/download_details.jsp?id=1421

Took about 5 minutes to do the whole thing. Seems to work fine now. Didn't even loose data.

Posted on Jul 30, 2009

  • 84 Answers

SOURCE: Garmin 305 will not turn on, charge, nothing

Try reset first .... Some adition info as well.....

These units seem to be suffering from a bad connection on the inside of the unit. My wife's did the same thing. There was a connection inside that wasn't making contact. First try cleaning the 4 brass connection tabs on the watch and check your charger to make sure the tabs are raised and not squished. Second try to reset the unit. Hit mode reset and power buttons all at the same time. Hold these for 3 seconds and then release. If these do not work here is what I did. There are no screws holding the unit together. I used a exacto blade to very carefully pry the unit apart along the side seam. It's not easy to do. Be very cautious and gentle. Work the thickness of the blade into the joint to gently wedge apart. You are not trying to remove material! Once apart you will see some fingers that make a connection between the upper and lower part of the unit. This is where the problem was with my wife's 305. I gently raised these tabs to make a better connection, It's been working ever since. I didn't try it before but try pressing very hard on the unit where it says Forerunner 305. The case is very hard so it might not work. But if it powers up when pushing you found your problem. Hope this helps. Here is a link I found on opening a 205 (Same process) http://ctorunner.googlepages.com/dismantleforerunner205 To put the unit back together use Automotive silicon/gasket maker. Use a tooth pick to put a VERY small amount of silicon around the entire seam. Put the two half's together and wrap tightly with electrical tape. Test the unit immediately to see if it powers on and off. If it does not open it back up and raise the small prongs that make the connection from the bottom half to the top half. If any silicon squishes out the sides wipe with water and a rag. Let the unit sit over night. In the morning remove the tape.

Posted on Mar 11, 2010

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SOURCE: garmin ege 305 will not connect with computer

You have to (re)install garmin gstart software on the computer. The driver is installed together with the application.

If it appears as new hardware this is because the driver is not installed.

Check also if gstart is started before connecting device.

Posted on Sep 04, 2010

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1 Answer

Garmin Forerunner 210W screen is blank. No charging symbol appears when it is on the charger.


Not sure if this is useful but double check that your charger connection to the Garmin is actually clean. I've had to clean the contacts for both my 405 and my 610 in order to make sure there was a solid electrical connection. Have you tried resetting it?

Feb 20, 2014 | GPS

1 Answer

Garmin 305 will not power on. When connected to charger screen says "battery charging complete" but will not power on. Advice?


two things... go to www.garmin.com and see if your gps qualifies for the battery recall. and second try powering it on when the power cord is hooked up rather then just on battery. then try it without the power cord

May 14, 2011 | Garmin Forerunner 305 GPS Receiver

1 Answer

305 edge screen is hard to read


There is a contrast parameter in the "Parameters" -> System -> Display

You can increase it. Otherwise you may use backlight by short press on start button. duration of backlight also tuned on the same menu.

Jan 21, 2011 | Garmin Edge 305 GPS Receiver

1 Answer

I put the 305 on the charger at night and I see the charging in progress message. When I wake up it is blank and the unit will not power up? It's like the battery is dead and it won't respond to the...


Over charging sometimes does that effect.

However, best is reset the device. Try soft reset first, if not sufficient, try hard reset.

Soft reset : Hold mode and lap/reset for 10 seconds, then release.
Hold start button then for 10 seconds, device should restart.

Hard reset : Hold mode and start button. 10seconds after, still holding them, pulse press lap/reset button, then release all.
You should get a screen asking to confirm reset to factory settings. You'll loose all data by this, but device should restart with normal behavior.

Sep 26, 2010 | Garmin Forerunner 305 GPS Receiver

1 Answer

It is totally dead and will not charge.


Had same issue... this worked for me:
1. Snap into charger base & plug into wall. Screen still blank. 2. Press Lap/reset, Mode, & Power buttons all three at the same time & hold for 3 seconds - unit will reset. Hopefully then you'll get the 'charging in progress' message.
(also make sure copper points/connectors on unit and charger base are clean).

Aug 28, 2010 | Garmin Forerunner 305 GPS Receiver

1 Answer

Garmin Edge 305 completely dead, any ideas why? It worked yesterday.


I found that switching the device on and/or off while connected to the computer can leave the screen blank, and won't give any sign of life when the ON/OFF button is pressed. In reality the device is on and the batteries will drain. Try a RESET in that case by pressing ON/OFF and MODE buttons, and briefly pressing the LAP button.

Jul 22, 2010 | Garmin Edge 305 GPS Receiver

1 Answer

Garmin only turns on when its on the cradle charging. ONce I remove it, the screen is blank and nothing happens. Is it the battery or connection inside?


Probably the battery. My battery lasts all of 20 seconds since i almost always have it plugged into car charger i guess i killed battery

Mar 15, 2010 | Garmin Forerunner 305 GPS Receiver

4 Answers

Garmin 305 will not turn on, charge, nothing


try holding down the reset and mode buttons together for 10 seconds, then try turning it back on.

Sep 19, 2009 | Garmin Forerunner 305 GPS Receiver

1 Answer

Won't turn on or charge


Press Mode (bottom left side button) and Reset (left front button) simultaneously, let go, then press On (top left side button).

Jul 28, 2009 | Garmin Forerunner 305 GPS Receiver

12 Answers

My Garmin 305 has died


Did you try a soft reset:

With the unit in hand press and hold the mode reset and power buttons all at the same time. Hold these for 3 seconds and then release.

Nov 08, 2007 | Garmin Forerunner 305 GPS Receiver

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