@PohGin Hello, Thanks so much for sharing all the detailed info, I sent you the debug tool via email with forum ID 274200 To address the issue and try to fix it, we would like to have a specialist...

@GIL007 Good day, I'm afraid to range extender does not support Guest Wi-Fi feature. Devices connected to range extender (AP mode) also obtain IP addresses from main router, they are under the same...

@Vempati Hello, Ensure you have tried a different power socket for the range extender. And try a factory reset for it: with RE powered on/ plugged in , use a pin to push the reset hole until most...

@Abadi1964 Hi, Here is a set up video that may help: https://www.tp-link.com/support/download/re220/ You could factory reset the extender before set up. RESET: with RE powered on, use a pin to keep...

@Charalie Hello, Most of the time range extender set up failed (leds off) due to the incorrect wifi password was put in during the installation, can you help verify your Wi-Fi password by forgetting...

@Rahul1201 Hello, You could try to lower or turn off the Firewall settings on router and modem and see if that helps. Try to change router's DNS to 8.8.8.8 or 8.8.4.4 If still the same, may I know...