@Poppylover Some range extender supporst power schedule, for details you may check its UG of that range extender from official website. May I know the model & hardware version of your range extender?

@SHEELA Good day, May I know how about the Led status on Range extender after you set up the extender? If only power led lights up after you set up RE, please try suggestions here: 1>Please verify...

@ashishgupta Good day, If your range extender could not detect router's 5Ghz Wi-Fi, here is a related post that could help: [Troubleshooting] TP-Link Range Extender is not detecting the 5GHz Signal...

@SgrF Good day, May I know did you turn RE into Access Point mode when connect RE to router via Ethernet cable? If not, please refer to this instruction to set up Access Point for RE:...

@Thethar Hello, Do you mean RE is not powered on, or the set-up is failed? Detailed issue description including the TP-Link device model as well as its hardware version will help a lot in addressing...

@Ivoncka Hello, If you want to use multiple REs, it is recommended to connect to no more than （<=） 2 range extenders to the router & both range extenders connects to main router: Topology 1: RE )))((...