I have a Grundig C8000 automatic radio/cassette player and it does not work any more. On the U1 t/m U6 channels I hear nothing and when I switch on the muting switch I hear noise. Noise is also heard on the LW, MW and K/SW1 channels. On the K/SW2 channel I hear slight noise between 41 and 19 meters. Below 19 m, the noise becomes stronger. Could you tell me what is wrong and if I could fix it myself?