@Big-dog123 Try to reset the RE200 to its factory defaults by pressing the reset button for about 10 seconds. Upon successful reset you should be able to re-configure from scratch. If that doesn't...

@Cheshie If you changed your main Wi-Fi network you should reset the range extender to its factory defaults and re-configure from scratch. To reset the RE press the reset button for about 10 seconds...

@Flopy Are you using the Smart Connect feature ? If you disable that and use a separate SSIDs for the wireless bands can you see the 2.4GHz SSID ?

@Paul_S_ Yes, usuing the TL-WPA8631P explains everything.

@hopkins This sounds like a reasonable approach. Wish you a good luck in this endeavor.

@Dharmkanani If you forgot your router login password you should reset the router to its factory defaults and re-configure from scratch. To reset the router press the reset button for about 10...