Hello
I need help please.

Until yesterday my entire system worked perfectly.

I have 300mb fiber optics in my house, with a modem from the Mexican company TELMEX (I don't know brand or model).

FIBER --> cable --> M5 --> cable to my PC and WIFI to everything else.

Suddenly today I came back from work and I didn't have internet (green light on my 3 M5s). I thought it was my ISP, so I restarted the modem and it was still the same. No wifi or LAN in my house.

After rebooting all the M5s, everything remained the same.

Here comes the strange thing. If I connect the LAN cable from my PC directly to the fiber modem, I have internet without problems.

After trying everything, I factory reset all the M5s and created my entire wireless network again. Without changes, it still doesn't work.

I have wired LAN and wireless LAN, but no internet. I can see and access other PCs on my network, but not the Internet.

I even downgraded to 2 previous versions of the firmware, and no changes.

I don't know what else to try, I really reached the limit of my knowledge, and I tried all the Google suggestions I found on this topic and this M5.

I tried to set Manual DNS, if I use google (8.8.8.8 or 8.8.4.4) instant red light on the M5 and it says cant reach internet.

Set it again to auto, instant green light and no error but still no internet. Set again to manual and use 1.1.1.1 and 1.0.0.1 and still green light, no error and NO INTERNET!

PLEASE!!! What else can I do other than trash my M5 mesh and buy a new one???