@Freddy_Ro1 Hi, welcome to the community. Please refer to RE220/RE200/RE190 Keeps Restarting Automatically for more advice. Best regards.

@Vayne42 Hi, I'm afraid you need to connect the broadband modem to the WAN port on AXE75. Or you could try to set the broadband modem into Access Point mode if possible. Thank you very much and best...

@Camila1995 Hi, It is suggested to refer to this link and update the TL-WA850RE to the latest firmware first: Wi-Fi Range Extender Causing Host Router No Internet Best regards.

@4glt Hi, welcome to the community. Can I have more details about the current issue? How about the LED status on the extender? It is also suggested to refer to: Unable to Connect to WiFi Extender or...

@Kukurtlu_Ev_Ext Hi, Do you mean the web management password? You can hold the reset pinhole on the RE450 for 1-5s till all the lights turn on once then off to factory reset the range extender. Best...

@Franek1990 Hi, Thank you very much for the details. I'd like to escalate your case to the senior engineer directly via email. Please check later whether you could receive my email. Best regards.