@Kevin_Z it was a cat5 cable( not cat5e either) , i changed to 10 meter cat6, now it work perfertly. As for the tl-wn8200ND , i try all wireless channel , it can see the router as available network,...

Recenlty replace tplink ac1200 with ax50, one of my desktop with a 15 M lan cable is losing signal. with AC1200, this never happen before, in order to solve this problem , i installed a router switch...