Thread: 3790 in endless boot loop

If someone could please help. I have a US 3790, just arrived yesterday. I tried to update with Thai firmware 2.10. Now it is stuck in an endless boot loop. I cannot do a hard reset. I have turned it off, then tried putting my finger on both the lower right and the upper left corner while booting, and it doesn't work. It does not show up in Windows Explorer for me to use a cure firmware. What can I do?

Here is a video of it: [Only registered and activated users can see links. ]

3790 also get into rebooting loop when flashed to
- Sg/Myswv 2.50
- Taiwan swv 2.10 / 2.30
- CHN swv 2.40
- Thai swv 2.10
- ......

Don't worry., 3790 is hard to die. believe me .

It's the same version., thanks to caty.,

But I cannot access the device. It will not let me do a hard reset. It does not show up as a USB device in Windows. Updater says no usb device connected. Even the Garmin website cannot detect the device. What can I do?

Originally Posted by bkk2009

But I cannot access the device. It will not let me do a hard reset. It does not show up as a USB device in Windows. Updater says no usb device connected. Even the Garmin website cannot detect the device. What can I do?

It will not let me do a hard reset --> Hard reset won't help you.

But I cannot access the device.--> Yes., right ! so I said you have to access pre-boot mode for connection.

It does not show up as a USB device in Windows--> also right.

Pre-boot mode
1). when garmin logo appear., press your finger above "G" of "GARMIN"
2). you will see a little "system"
3). now you are in pre boot mode

0).on computer.,--> drag rgn file on updater.exe., -->select USB
1).Plug in usb with 3790
2).access pre boot mode
3).when you see "system" on 3790., plug in usb into computer
4).You will see your device detected on Updater.exe
5).Press OK on updater.exe
6).Still press your finger till complete updating firmware.

Good luck

Originally Posted by bkk2009

But I cannot access the device. It will not let me do a hard reset. It does not show up as a USB device in Windows. Updater says no usb device connected. Even the Garmin website cannot detect the device. What can I do?

Mine did the same thing i.e. endless reboot loop when connected to USB, but ONLY if it was navigating to a destination. The solution was to unplug from USB, hit stop then reconnect.

Ok, I was able to get into pre-boot mode and used updater, but it says no updates available for your product"

can I use a differnet RGN file?

Try original US gupdate.gcd saved to OUT.rgn & flash again.