I'm sorry to hear that. For what it is worth, the information provided does lead us to some final clues @Marian2020.
You have known working wired ports. Does the WAP still face problems if you use a known working wired port (swap the laptop's working connection by disconnecting it and plugging in the WAP on the same port)?
If the problem persists after this, replacing the cable with a known working cable is the next step.
Finally, if all the above steps do not achieve success, you may have a faulty or damaged unit.