Can someone help me please. I have crimped both ends nicely. When I test it using my LAN tester, one end glows nicely from 1 to 8 but the other end glows 1&2 at the same time. I have tested the tester with another cable and it works perfectly fine. I have crimped for more that 20 times and each time I get the same result. What can I do to overcome this issue? THanks
Inspect the length of cable- is it pinched or damaged at any point?
It sounds like pins 1 and 2 are shorting out somewhere. Hopefully it's happening close to one of the ends, so you can cut off the damaged section and recrimp.
If the cable is stapled to a wall or in a place where it might have been stepped on a few times, then that might help you narrow down where the damage occurred.
How long is the cable? For me, if it was a relatively short length (25ft or less), I would rather throw it out than risk introducing a problem into my network.
Cables are pretty cheap these days but reliability is priceless!
EDIT (moving my solution into my answer- originally posted it as a comment)
Just recrimp using a non-standard configuration. I doubt you're using CAT6 cables (most people don't, especially at home), in which case only pins 1+2 and 3+6 are in use. Pins 4,5,7 and 8 don't carry a signal. Keep pins 3 and 6 as they are, then replace 1 and 2 with 7 and 8 (or 4 and 5) and you should have a perfectly functional cable.
Potentially you could have this fixed in 10-20 minutes!
When testing the cable afterwards with your tester, just make sure 1,2,3 and 6 function properly, and ignore what results the others give you. You can definitely fix it. 6 of the internal wires are good- and you only need 4. When I did this myself I made sure 1,2,3 and 6 matched up, then literally plugged the rest in randomly (just to keep them out of the way) and it's worked great since then.