Quote Originally Posted by Kmode View Post
Down Up
SNR (dB): 16.1 16.0
Attn(dB): 53.5 33.2
Pwr(dBm): 0.7 12.4
Max(Kbps): 4060 516
Rate (Kbps): 1023 412
These are all much better so your extension wiring is definitely suspect. If you need to carry on using it then see the Cabling and Faceplate forum for tips on extension wiring. In particular, look for any wires connected to terminal 3 of the master socket and disconnect them as they are a frequent cause of unwanted noise interfering with the broadband signal.

Then as IANTE says, get the cap removed.