I had similar problem. Not quite similar confoguration as yours, only using two LNBs.
I have attached a guide for tuner setup, just change the LNBs and choose the desired satellites to suit your settings.
If you are using a single input Disecq switch just scroll through the Disecq selection AA/AB/BA/BB until you get signal. Do one satellite at a time otherwise it gets to confusing!
The mistake I did: I forgot to name LNB1, LNB2 etc. If you don't then only one satellite is scanned!
Hope this helps.
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