Hi I have DM800SE that finds only one satellite from 3 available.That found satellite is probably with the strongest signal. It could be because one or more control signals or rather data signals to/from tuner are weak. Or is there a problem anywhere else? But how to find those faulty/weak signals coming from Tuner to CPU ? Any idea? Thanks
Maybe by measuring the resistors near the tuner slot as the 4p RP/RN or other resistors. In any case I had a few years ago a issue which sounds as you have and according to my notes it was caused due the RN1302 with a extra note that I had found it by using some ice spray and measuring the ohm values from the sector which reacted. But still, there are many parts between the tuner pins to the cpu, so you need to have a bit of luck to find it and of course the cpu could also cause this.