I'm sorry to hear that you're having trouble resetting your TP-Link CPE220. If the usual methods of resetting the device manually or via the outdoor device or PoE adapter are not working, there are a few alternative methods you can try:
1. Power cycling: Disconnect the power supply from the device and leave it unplugged for about 5 minutes. Then, reconnect the power supply and see if the device resets itself during the boot-up process.
2. Hardware reset button: Most TP-Link devices have a small reset button that can be accessed by using a paperclip or a similar object. Locate the reset button on your CPE220 and press and hold it for about 10 seconds. This should initiate a hard reset and restore the device to its default settings.
3. TFTP utility: If the above methods don't work, you can try using a TFTP (Trivial File Transfer Protocol) utility to reset the device. This method involves connecting your CPE220 to a computer via Ethernet and using the TFTP utility to upload a firmware file to the device. This can be a bit technical, so I recommend following a step-by-step guide or contacting TP-Link support for assistance.
Before attempting any of these methods, please ensure that you have backed up any important configurations or data from the CPE220, as resetting the device will erase all settings and revert it to factory defaults.
