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by anonymous
Hi I just tried to update my firmware on the TRB140 and it seems to be bricked, all lights are flashing and no access from either lan or USB .

the web interface said it completed correctly and it just rebooted then would not start, I left it for 2 hours and nothing.

I only went from the previous firmware to the latest.

I have tried pressing the reset button and removing the SIM card, rebooting and no luck.

any ideas?

kind regards
John

1 Answer

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by anonymous
Hello,

Please try to perform the following procedure with your TRB device:

1. Turn off/unplug TRB140

2. Press and hold reset button, at the same time plug the power cable and keep holding reset button for about 5 seconds (mobile signal LED's should start blinking)

3. Download "ADB software" and "rootfs.ubi" file from here: https://kaunas.teltonika.lt:444/f/a9ffe2e9d98446f2aaf3/?dl=1

4. Install ADB software

5. Place rootfs.ubi file in any easily accessible directory (e.g. in "C:\Test")

6. Open CMD ("Command Prompt" window) with administrator rights

7. Use cd command to navigate to the place where you saved the rootfs.ubi file (Example: cd C:\Test)

8. Then use this command: fastboot flash rootfs_a rootfs.ubi

9. When it completes, use this command: fastboot flash rootfs_b rootfs.ubi

10. When both commands are executed and finished running, unplug power from TRB and plug it again. It should boot up as normal

11. Install intermediate firmware version, which can be downloaded from here:

https://wiki.teltonika-networks.com/view/TRB140_Legacy_FW_Upgrade_Instructions

12. Install desired firmware version to TRB through WebUI. Lastest firmware can be downloaded from here: https://wiki.teltonika-networks.com/view/TRB140_Firmware_Downloads

Best regards,
by anonymous
Thanks for your quick reply.

I tried this, but still no luck.

The flashing was successful, but it never starts in working mode.

any other ideas?
by anonymous
Hello,

If the procedure above did not help, if possible, I would like you to send the device to Teltonika for investigation. The first thing that would be needed from you is to send me the device's serial/IMEI number in a private message.

Once, I have that, I will notify you about further proceedings.

Best regards,