Hello,
Is the firmware upgraded in uboot v4.7.4?
https://dl.gl-inet.com/router/x3000/beta
You can try to upgrade uboot first, and then try to flush the v4.7.4 firmware, to see if it restores to work (system boot).
Unzip first, then upgrade .bin at 192.168.1.1/uboot.html
X3000_uboot_fip.zip (283.2 KB)