Hello @aliehab ,

Welcome to our community.

It looks like your TP-Link DSL modem router is stuck in a continuous reboot cycle, you might find these steps useful:
1. Power the modem router using the original power adapter, ensuring the adapter's output is compatible with the router's specifications.
2. Plug the router into a different electrical socket or use a surge protector to safeguard it against power surges.
3. Since your modem router is continuously rebooting in a cycle, skip the firmware update step for now.
4. Factory reset the router to its default settings. To reset, use a pin to press and hold the reset hole on the router for about 10 seconds until all the lights turn on momentarily.

It the suggestions above don't help, please contact local support for further assistance.