Yuanjing Tripath TA2020 channel failure :(

I have been happily using my Yuanjing Tripath TA2020 bought on ebay here in the uk. Sad to say the right channel has just given up on me whilst the left channel happily plays on. As a completely noob in this area can anyone suggest quite where I start in terms of fixing this thing or I am wasting my time?

Thanks P