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Reply With QuoteNew battery, same problem!
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19th January 2026, 11:31 PM #11Member
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Just FYI.
Once I had one device with only defective battery, that 'refused' to boot, even connected on external power supply.
After changing battery everything worked.
It's because battery has 3rd (control) line, which is used for comunication with device about it's state.
If that signal is not correct, then device refuses to boot, or work after 'basic' boot, as soon as OS checks state of battery.
Not sure if this is case, but maybe, it might help.
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Yesterday, 04:40 PM #12Junior Member
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Last edited by Boki; Today at 07:54 AM. Reason: approved
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Today, 08:38 AM #13Garmin/GPS Systems GMod.
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Frankly I had thought you'd only have a small chance of fixing it with a new battery because a battery charge level problem usually results in spontaneous shutoff in most devices rather than reboots or bootloops.
Because you have a bootloop, which if not attributable to a faulty file during the loading process, it's probably caused by a physical hardware failure. It's usually the flash memory chip failing before dying. So unfortunately, I would say that if you're absolutely sure you didn't re-use any old files from a backup that an impending total flash failure is most likely.
You could try booting it with only Garmin folder, etc., as explained in (iii) & (iv) of Post #9 to see what it does then. However, first re-do the format, ensuring you have the correct settings as shown behind the "program screen" Spoiler in the RMPrepUSB Thread: [Only registered and activated users can see links. ].'Thanking Posts' are banned. To thank someone, and/or to see hidden links and content, use the [Only registered and activated users can see links. ] button below left of the helpful post then refresh your browser [F5 key]. 'Thanking Posts' are banned.
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