# GX400 Firmware upgrade failure

**URL:** <https://forum.sierrawireless.com/t/gx400-firmware-upgrade-failure/8427>\
**Category:** AirLink routers\
**Created:** [February 9, 2016, 7:13am UTC](https://forum.sierrawireless.com/t/gx400-firmware-upgrade-failure/8427 "2016-02-09T07:13:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Wirelessnow](https://avatars.discourse-cdn.com/v4/letter/w/dc4da7/32.png) [@Wirelessnow](https://forum.sierrawireless.com/u/Wirelessnow)\
**Post date:** [February 9, 2016, 7:13am UTC](https://forum.sierrawireless.com/t/gx400-firmware-upgrade-failure/8427/1 "2016-02-09T07:13:21Z")

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I recently decided to upgrade my GX400 firmware from 4.3.3 to 4.3.4, as the first step to upgrade to the latest firmware. Figuring that it would take a while, I started the process then left it alone for several hours. Upon returning, I restarted the GX400 and logged in to the Acemanager interface which showed the firmware version to be 4.3.4, this being done within (say) 20 seconds of rebooting the device. I then lost the connection, and had no success in reconnecting until I rebooted the GX400. Again, after 20 seconds or so I lost the connection. I did a port scan on the default (192.168.13.31) address, and ports 22 and 9191 are open, so it would seem that something may have gone astray during the firmware update. As I do not really want to use the GX400 as a door stop, is there a painless way to resolve this, or do I need to return the unit to Sierra Wireless ?

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**Author:** ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)\
**Post date:** [February 16, 2016, 5:15am UTC](https://forum.sierrawireless.com/t/gx400-firmware-upgrade-failure/8427/2 "2016-02-16T05:15:17Z")

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Hi,  
Did you try to download the same Firmware once more??

-Alex

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**Author:** ![Wirelessnow](https://avatars.discourse-cdn.com/v4/letter/w/dc4da7/32.png) [@Wirelessnow](https://forum.sierrawireless.com/u/Wirelessnow)\
**Post date:** [February 16, 2016, 8:12am UTC](https://forum.sierrawireless.com/t/gx400-firmware-upgrade-failure/8427/3 "2016-02-16T08:12:47Z")

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Hi,

No, once was enough !! After the seemingly failed update attempt, the web interface no longer stays up long enough to allow access to the firmware update page, so I could not do that even if I wanted to…

Mike