Question about Garmin Edge 305 GPS Receiver

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Garmin Edge 305 - Uncommanded Power Down

When cycling on bumpy or rough roads, my Garmin Edge 305 powers itself down occassionally without command from me. I can always power it back up immediately but I've lost some data.

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  • halien Mar 05, 2008

    The unit turns off on its own and I need to turn it on again (annoying!)

  • rick1754 Mar 09, 2008

    unit turns itself off

  • ciclista Mar 15, 2008

    Same problem here. Frequent spontaneous power-downs for no apparent reason--bumpy roads not a necessary cause. This has made my 305 unusable. Reloading the latest operating system onto the unit had no effect. Neither did deleting all data from the 305. Plus, I bought my unit brand new from EBay, which automatically voids any warranty, according to Garmin.

  • Anonymous Apr 05, 2008

    same problem.

  • Anonymous May 31, 2008

    Does the same for me. Seems like a pretty poor design flaw given that it's a bike computer!

  • apsule Jun 19, 2008

    I get this, very frequently. Sometimes I can sail over rugh ground without a hicup, someties it just powers down when I'm stood still. Not impressed, I want to ride my bike, not nurse the computer

  • yoopdog Jun 23, 2008

    Unit first powered down by itself at the end of a road ride after going over some bumps (coincidence?). Notified Garmin, as the unit was still under warranty. Prior to sending out for repair, I downloaded the latest software. This appeared to fix the problem. Not so. The problem returned several months later. The unit is now out of warranty. I've notified Garmin again and I am awaiting my RMA return authorization number.

  • Anonymous Aug 13, 2008

    Same here- will try a software reset and see if that helps

  • cavudaz Aug 29, 2008

    My Garmin has started shutting off when hitting bumps. It has gotten worse. Today it shut off 6 times in 15 miles. Annoying!

  • Anonymous Sep 22, 2008

    My Garmin Edge 305 shuts off randomly. It doesn't matter if I hit bumps or not. It may shut off after 5 miles or 15 but I can't finish a ride without it shutting off.

  • Anonymous Oct 05, 2008

    I have exactly the same problem: uncommanded power down when I encounter a bump (using mountain bike). I can power up again immediately, but I have lost data and the power up is risky, as I need to divert focus from driving.

  • bobr666 Oct 12, 2008

    Had the same problem that gradually got worse after two years of regular use. I tried the repair solution and that worked well until the first time it got very wet and then water got in. Once that happened, I didn't want to go through the repair again, so paid for an out of warranty repair. They gave me what seemed to be a brand new unit. Two and half months in and that one has now started to fail in the same way!

    Fortunately, just inside the 90 day warranty, but a hassle!


  • Anonymous Oct 25, 2008

    My shut-downs started after 3 months

  • bhouse4 Jan 11, 2009

    I had the same problem, shuts off while in use , I bent up the spring connectors, now the power stays on but cadence goes out any answers? I replaced the battery in the sensor, and lined it up the ride light flashes still cadence works intermittently???

  • bmolloy Jan 21, 2009

    Same problem.  It is getting worse and even happens on smooth roads now.  Very frustrating.

  • Anonymous Mar 04, 2009

    Mine stops recording on its own.

  • clocknutz Mar 07, 2009

    Same trouble. Ruff road surface just keeps turning it off. Very, very frustrating. Have taken to putting it in my back pocket so I can at least get the information! Seems like Garmin should be sorting these out!

  • ckmramos Apr 10, 2009

    Unit power itself down with minimum vibration.

  • Anonymous Apr 24, 2009

    moved it from my mt bike (with suspension) to road bike - no suspension, would power-off at the smallest of bumps, 20 times (or more) in 10 mile ride. It will stay on fine in my back pocket, though.

  • Anonymous May 01, 2009

    I don't need to say much else. Same problem that everyone else is having. I love the product but hate having to power back up.

  • Alpinist May 09, 2009

    Mine just started doing the same thing

  • jedimaste195 May 21, 2009

    When on a ride (don't think I've noticed it on a run) the device turns itself off.



    I'm also having a (possibly related?) problem that the device won't "see" the USB port, take a charge, download its data to the software, etc.

    I have to wait DAYS to use it again... weird.

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I moved the battery wires to the main board, bypassing the spring contacts. No doubt my warranty is voided but at least the thing works now.
Garmin Edge 305 - Uncommanded Power Down - db47da4.jpg

Posted on May 28, 2008

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Call Garmin (800.800.1020), they have labeled this as a "known issue" and are now replacing units for FREE! Just sent mine off.

Posted on Jul 28, 2009

  • lfppat Feb 17, 2011

    I just called Garmin at the number above and they gave me a case number and asked me to send it back. They are going to replace the unit free of charge.

  • MichalYoung Jul 27, 2011

    No such luck for me ... they want $79 to swap it for a refurb.

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I've done a repair along the lines mentioned in the Motionbased forum thread:

  • solder wires to connect the battery leads directly to the GPS board.
  • add a thin rubber spacer to the existing spacer underneath the small board that contains the USB port (on the battery side)
Using magnet wire (thin, coated, plastically deformable) to solder the battery leads provides a very reliable contact IMO - since I've fixed my Edge I've taken it on numerous hard bumpy mountain bike rides with good result.

The extra spacer adds some compression to the springs and improves the reliability of the contact. Besides the battery leads, also the USB contacts are guided through this connector to the GPS board, so you want to have this connector in good working order.

I've posted a bunch of photos and more detailed instructions on my site (below are a few)...

Garmin Edge 305 - Uncommanded Power Down - c4f8700.jpg

ac889b6.jpg

Posted on Nov 14, 2008

  • bukwee Feb 24, 2012

    Yep Garmin wants $79 if its out of warranty. I guess I won't ever buy another Garmin product again. Foolish that they will charge for a known issue. Going back to my Cateye - takes a big *** lickin and keeps on tickin!

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The problem is with the spring contacts between the two halves of the unit that carry power from the battery (back half) to the computer (front half). If your unit is outside warranty, you can follow instructions here: http://forums.motionbased.com/smf/index.php?PHPSESSID=000a201aaa94d328628ad489c9067181&topic=6566.msg42076 I did this, and it helped some, but I am still dropping power on very rough descents (like stairs), so I'm going to try adding a capacitor to the computer side so it can tolerate the brief disconnections from the battery. Making the contacts perfect seems to be a more daunting task.

Posted on Apr 21, 2008

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I had the same problem an despite my edge being over 12 months old (18 I think) Garmin replaced it under warranty.

Posted on Aug 16, 2009

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I've just rang them with the same problem in the uk and its £66.66 to replace outside of the warranty

Posted on Aug 16, 2010

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Having a problem with the cadence sensor

Posted on Jun 05, 2010

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I also expierenced the unit powering down at the slightest bump. Called garmin support (be patient) they told me it is a defect;send the unit back. In less than a week I recieved a brand new 305.thank you Garmin.

Posted on Sep 11, 2009

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1 Answer

Used my garmin edge 305 today on the ride, it worked fine, powered off after the ride. Got home turned on to review my stats and then powered off and went to upload and wouldn't upload, so tried to turn it...


Edge 205 or 305 often crash, then impossible to power on again.

Here is the way to reset the Garmin edge :

Soft reset : hold mode and lap/reset buttons for 10 seconds
Hard reset : device should be powered down, hold start and mode buttons for 3 seconds then pulse press the lap/reset button.

After soft reset, you need to hold start button for up to 10 secs before it starts.

After hard reset, you will loose all your data, including profiles.

Jan 30, 2011 | Garmin Edge 305 GPS Receiver

Tip

How to reset your Garmin Edge 205 or 305


Edge 205 or 305 often crash, then impossible to power on again.

Here is the way to reset the Garmin edge :

Soft reset : hold mode and lap/reset buttons for 10 seconds
Hard reset : device should be powered down, hold start and mode buttons for 3 seconds then pulse press the lap/reset button.

After soft reset, you need to hold start button for up to 10 secs before it starts.

After hard reset, you will loose all your data, including profiles.

on Sep 05, 2010 | GPS

1 Answer

The edge 305 unit does not answer to hard and soft reset command


Just to be sure ...

Here is the way to reset the Garmin edge :

Soft reset : hold mode and lap/reset buttons for 10 seconds
Hard reset : device should be powered down, hold start and mode buttons for 3 seconds then pulse press the lap/reset button.

After soft reset, you need to hold start button for up to 10 secs before it starts.

After hard reset, you will loose all your data, including profiles

Now if this does not work, you should check battery. Does the device charge when plugged on PC ?
If it does not, either battery is out of order or the contacts inside the device re broken. This may happen if device is used in continuous vibrating environment like mountain bike.

Changing battery or fixing contacts issue is explained there :

http://blog.mtbguru.com/2008/11/06/surgery-on-the-garmin-edge-305/

Jan 04, 2011 | Garmin Edge 305 GPS Receiver

1 Answer

Garmin edge 705 will not turn on


Edge 205 or 305 often crash, then impossible to power on again.

Here is the way to reset the Garmin edge :

Soft reset : hold mode and lap/reset buttons for 10 seconds
Hard reset : device should be powered down, hold start and mode buttons for 3 seconds then pulse press the lap/reset button.

After soft reset, you need to hold start button for up to 10 secs before it starts.

After hard reset, you will loose all your data, including profiles.

Nov 08, 2010 | Garmin Edge 705 Handheld GPS Receiver

1 Answer

Sorry but honestly...Since GARMIN launch the EDGE this problem is still not resolved by them. The EDGE 305 had the same problems. Just search the www and you will see. My 705 died on me after just 2...


Edge 205 or 305 or 705 or 605 often crash, then impossible to power on again.

Here is the way to reset the Garmin edge :

Soft reset : hold mode and lap/reset buttons for 10 seconds
Hard reset : device should be powered down, hold start and mode buttons for 3 seconds then pulse press the lap/reset button.

After soft reset, you need to hold start button for up to 10 secs before it starts.

After hard reset, you will loose all your data, including profiles.

Nov 01, 2010 | Garmin Edge 705 Handheld GPS Receiver

1 Answer

Garmin edge 305 screen not on. went over some very rough roads and lost the screen. can hear beeps when i push some buttons but no screen. tried the soft and hard resets described by some w/o success.


Probably a bad contact inside then.

Be careful however to update the device and hard reset it once again before trying opening it.

If device under warranty please send back to Garmin, if you open oit warranty will end automatically.

If none of this is possible then try trick posted at following site :
http://blog.mtbguru.com/2008/11/06/surgery-on-the-garmin-edge-305/

Sep 12, 2010 | Garmin Edge 305 GPS Receiver

1 Answer

Garmin Edge 305 will power off in a min or 2 riding in afternoon


This is a generic problem with the 205 and the 305 go to MTBGurublog and look up 305 problems there is a blog that shows how to open and fix it

Jul 07, 2009 | Garmin Edge 305 GPS Receiver

1 Answer

Garmin Edge 305 shuts off from vibrations during normal use.


http://www.mtbguru.com/ go there and all will be revealed my friend This is a common problem with 305/205... there is a battery connection in unit that thru use becomes strained(hence rough road shutdown) i followed the instructions in the blog and inserted a spacer in battery terminus and no more probs... good luck

Mar 15, 2009 | Garmin Edge 305HR GPS Receiver

1 Answer

Garmin 305 Edge and GSC 10 not receiving one another


Solution copied from Garmin



Pairing the Edge 305 and sensors
Once you have installed the Garmin Edge 305 and the cadence sensor they need to be paired. As they communicate wirelessly with each other the Edge needs to connect to each sensor before it can receive input from it.

The initial pairing needs to be done away from other wireless systems this allows the Edge to pick up the sensors it is supposed to be monitoring. This is a little like black magic, but it seems to work quite easily.

The cadence sensor has a small press contact which puts the sensor into pairing mode. The HRM just seemed to connect by itself.

Subsequent pairing is much faster as the Edge 305 seems to remember which sensors it is paired with. If you have problems or need to change one of the sensors then you can use a setup feature to either turn the sensor off or to re-pair it.

Feb 22, 2009 | Garmin Edge 305HR GPS Receiver

2 Answers

Edge 305 turns off at every little bump in the road?


The above link no longer works.
But this one does (for now): http://blog.mtbguru.com/2008/11/06/surgery-on-the-garmin-edge-305/

I made this surgery and it now works great.

Aug 18, 2008 | Garmin Edge 305 GPS Receiver

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