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GPS Issue - Forerunner 235

Hello everyone,

happy owner of a Forerunner 235 since two years, I am now facing a major issue I cannot seem to fix.

The watch has been working well with minor glitches for close to 2 years until Monday 23rd when it ran out of battery while sleeping. No big deal I would assume, plugged it in in the morning and started charging, once at 100% I put it on and soon understood something was amiss, this is the status as we speak:

1 - the watch would not find ANY GPS signal, no matter how long it stays under clear skies. I also travelled a bit in the last days, it never picked up ANY signal whatsoever
2 - no more sleeping patterns recorded, it does not record when I fall asleep or wake up, if I put manually the times in connect there is no movement recorded
3 - I can manually adjust the time of course, but every time I try a soft reset the watch reverts back to Monday 23 at 7am, and I cannot adjust the date manually

What I tried so far:

1 - simple soft reset and leave the watch alone for 1hr + - FAIL
2 - reset + delete defaults - FAIL
3 - hard reset - FAIL
4 - manual firmware downgrade to 7.10 and update back to 7.50 - FAIL
5 - sync with Garmin exress and with phone - this works but GPS still dead

My last option I could think of is now to let the watch drain its battery completely, in the hope this causes some kind of deeper shut down of sort, but my expectations are nice and low.

Pretty bummed about this, the watch has been great and going strong but its starting to look I have to fork out for a replacement. Anybody else had similar issues?

Cheers!

Gabriele
  • my fix still working after 8 months, the tracks leading to aerial rust and crack, hence no signal 

  • Just done this and found the same problem.  A tiny corroded section which I repaired and now I have GPS again!  Unfortunately the edge of the screen where the glue strip was, tore and it doesn't look perfect now its reassembled but otherwise OK.  When in bits I took the buttons apart and one of them must have let water in and was the cause of the problem.  Little touch of olive oil and hopeful the o-ring will be a better seal this time.  Shame the gps antenna isn't a metal strip like the bluetooth one - there will be a good reason no doubt.  Thanks for posting your findings and experience!

  • Sorry for your troubles. Wish I could be of help, but I am curious about this:

    manually adjust the time

    How did you manually adjust your time? I thought the 235 would only set the time from GPS?

    Thank for your reply!

    Sincerely Eric

    [edit] Oops, now I really hope things were sorted out. Just noticed when the original post was made. D'oh! 

  • Gabriele, ad a very similar problem, and this fix by Jim solved it for me: 

    forums.garmin.com/.../1144213

  • Hi,

    the GPS antenna is plastic. Did you use an iron solder?

    thanks