Gl-ax1800 doesnt turn on

[K3rn3l_Ku5h]

Use Uboot to get it back to 3.214 and update uboot

Debrick via Uboot - GL.iNet Router Docs 4

Also Uboot should be updated

Flint GL-AX1800 Power tripped didn't dial up PPPoE

Here is how to flash firmware by uboot. To flash uboot, the difference is to access the http://192.168.1.1/uboot.html page and upload the uboot binary. Make sure to compare the md5sum value(see filename) of the downloaded uboot binary for integrity.