I have reset the extender and still getting the same issue. Whenever the computer restarts after more than a few hours it will get stuck on the auto configuration address 169.254.x.x. Only restarting the interface will fix it
If you see a 169.254. x.x address, it means that the DHCP server is not reachable. The PC will not work because there is not a router to or from that PC.
Troubleshoot this by finding out why the PC cannot see the DHCP server.
Check that the DHCP Server Lease isn't set to a short time.