I have replace my rj45 connector crystal head and using cable tester and everything is was fine, but when I try to use the wifi extender it couldn't detect my LAN.

last time my office also same, cable test ok, but plug in PC cannot get network, dono why

Cross or straight

Straight T568B

Isn’t Wi-Fi extender utilize your Wi-Fi signal to extend the signal, the network port on the extender to plug into laptop/pc ??

Try using a laptop to test whether you get any network

Previously it work but after I relocate it doesn’t work anymore.


Tested didn’t get the lan connection

There is another issues which I plugged my lan cable to switch it does have the led light up but i didn't plug anything lan port. so weird

It means either the cable itself is bad or the switch itself is configured wrongly

I'm using TP Link easy smart switch https://www.tp-link.com/my/business-network...tl-sg1016de/v3/ it doesn't have any configuration.

Also I have cut and recrimping the rj45 crystal head same problem.

If not mistaken, need cross. Router to computer need cross.

most network equipment have auto MDI, which self-configured cross/straight

Ya my home network all using straight but now only this cable have problem, at tp-link switch the led light on but i didn't plug any cable on my ethernet panel.

If I understood your first post, you only re-crimped one RJ45 head? If so, check that the other end is also T568B.