GL-X3000 stopped working. Cant even go into uboot mode

hi, I was away from home for a few days and when I came back the router stopped working. Only the power icon works. From what I see on the internet, a lot of people have problems with this router. I tried to go into uboot mode, to upload another software but it doesn't work.

I connect via ethernet cable to my PC. I hold down the reset button and plug the router into the socket. the power icon is displayed, then the internet icon flashes for 5 seconds and then 2.4 ghz. I release the reset button. I changed my IP to static 192.168.1.2 and try to enter 198.168.1.1. unfortunately it doesn't do anything. I can't enter the website, it doesnt load. I tried via LAN and WAN 2.4 no reaction...

Am I doing something wrong?

Isn't the default router address 192.168.8.1?

Not in Uboot.

In Uboot it's 192.168.1.1

A full nmap port scan 1-65535 to "192.168. * . *" Using the eth2 port and see what is up.