On my Xtrend ET-8500 I have two aerial cables for FreeSat, both of them are losing signal every day. Initially rebooting did help, but lately I had to unplug both cables, swap them, wait, reboot, turn off and it may detect signal if I am lucky. Also what I can not understand is following. Tuner A is connected and Tuner B disconnected. If I touch with inner wire to the external part (where it is screwed) of the Tuner B then Tuner A gets full signal. The same is true if I change cables or Tuners. Any ideas what may cause this?