Status 3 weeks later: I did not manage to get the link to work even after resetting (factory reset) both CPE510. The oldest unit did work until the other unit of same age (a pair bought together some...

@Hank21 Thank you, I will try a reset of both units although I find it strange that it should have happened anything to the old unit I have not touched physically (still on its pole) nor changed...

For some years my two TP Link CPE510 (access point and client) have worked fine with a speed of close to 100 Mbps. During a recent storm the mounting pole for the access point broke and the unit...