This video will help you on testing LAN Cables or Ethernet Cables using a Network Cable Tester.
If your LAN cable doesn’t seem to be transmitting a signal, these testers can confirm if the cable is bad.[1] Look online or in an electronics store for an Ethernet cable tester. They usually come in 2 pieces, the main testing port and a receiver port.
Read the instructions for any product you use. While cable testers are similar, different products may have different instructions.
The cable tester may have both an insertion and receiver jack on one piece, meaning you don’t need a two-piece tester. Some other testers have both options, so you can run the cable into other rooms if you want to.
Make sure there is a battery in the tester before you use it. Most take a 9V battery.
Plug one end of the cable into the slot of the tester. This is the insertion port. Plug either end of the cable into this port until it clicks. This indicates that the cable is fully-connected.
It doesn’t matter which end of the cable you insert into each port. Both ends are identical.
Turn the tester on and watch if any lights don’t activate during the cycle. Once the cables are connected, turn the tester on to begin the test. The tester will cycle through 8 positions and a ground connection, each represented by a light on the tester. Since the cable isn’t grounded, the ground position won’t light up. If all the other connections are good, then each position will light up. If any besides the ground don’t light up, then the cable is bad.
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