Hi@Udbhatt,

Please refer to the following suggestions:
1. Please plug the extender into another power socket.
2. Hold the reset pinhole until all the lights turn on for one second, then off.
Note: If the reported models are RE220 V3/RE200 V5/RE190 V5, always repeat to reboot, after trying the above troubleshooting methods, please refer to RE220/RE200/RE190 Keeps Restarting Automatically for further suggestions.
If still same, please contact local technical support.