>>With router -- SF1008d--sf1005d connected, what is the led status of the 2 swicthes? 

 

ON. But it takes a lot to get a stable ON

 

>>With computer connected to the SF1005D, click here to get the IP and gateway of your computer. Please show us a picture of it. 

"here" link doesn´t work. But computer doesn´t get an ip.

 

>>Meanwhile, please repeat it with computer connected to the SF1008D.

As I said: it works, gets ip, navigates

 

>>After that, try to ping the gateway of the router from the computer which connects to the 2 switches separately. 

it doesn´t work.

 

I tried with another cable (20 m CAT6 no shielded), it works perfectly.

Difference between the two scenarios:

 

1. First cable: 25m CAT6 shielded running along power line (I know I shouldn´t do that but I have no choice)

2. Second cable: 20m CAT6 UNshielded not close to power lines.

 

For now:

I think that the problem lies in the ethernet cable running along power lines.

 

BUT it seems that the TP-LINK switches are more sensitive to power lines than a PC.

I have replaced the tl-sf1005D for a tl-sg108E (UnmanagedPro) and it works fine! I still have doubts about the ethernet cable running along power lines, but it works. It seems to me that the tl-sf1005D is more a DESKTOP switch (short distances) than a proper NETWORK switch. Thanks for all.

@Kevin_Z 

Hi, while reading other posts, trying to find a solution to my problem, I found this post, which is identical to my problem, though a different model. I just prchased a new TL-SG105S, plugged everything in and my 2 computers can 'see each other', but I cannot get an internet connection to my router. If I use a 2 metre ethernet cable between switch and router, it connects no problem, but when I use a 25 metre ethernet cable, it will not connect. 

The 25m cable connects 1 computer direct to the router no problem, I know the cale is good, I have done the 'ping test' etc and everything works well between the 2 computers.

Thanks.