Problems of cable 20 m ethernet LAN card

I connect to the Internet through a router via an ethernet cable from 5 m. I want to extend that to a 20 m cable. When I plug the cable of 20 m, the lights at the rear of the lappie did not and I can not establish a connection. I tested the cable and changed for a new one.
The cable works fine when I plug it into my desktop computer using the same router and connection for net access. Can anyone help?

If you use the 25 m cable, it cannot work because the signal is too weak. You need a Repeater for the reinforcement of signal.

Tags: Toshiba

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