Good afternoon, I have recently purchased the Hornby Britannia class - Anzac, all working well with the standard 8 pin decoder. I then decided to fit a TTS sound decoder to complete such a beautiful loco, all was well until two weeks after fitting, which is when the loco stopped responding, no sound or movement at all, after a few hours trying to troubleshoot, I decided to try the decoder in a different loco, and found it to be dead. The loco also still runs perfectly fine on with a standard chip inserted. After contacting the retailer, they agreed to exchange it, however when the new one arrived, this TTS decoder didn't make any sound and only moved slowly in the reverse position no matter how much I turned the power control unit. I took the chip out and placed the standard 8 pin back in and the loco is working fine again. So my question is: is it just plain bad luck that two decoders do not work in a row, or is the issue something else? My Set Up: Hornby select unit with standard 1amp power supply. track connection is the green button one. 10ft X 6ft single track line with double track at station and sidings total of 6 dcc fitted locos on the track (not all operating at once) all working fine with decoders from Hornby and Bachmann All my track, locos and equipment has been bought from either Hornby shop or Rail of Sheffield, who I must say have had great customer service so far. Thank You.