Okay, You did swop over the cables between the 5-2 switch and the LNB so it is unlikely there is anything wrong with the LNB.
The LNB voltages are okay ( very good actually).
So the next thing is to check that you have connected the cables to correct ports on the 5-2 switch. Must be connected port H/L and V/L.
Next would be to try and see what you get with an old decoder connected to universal ports on the 5-2 switch.
But the easiest would be to try and verify the decoder works either by taking it in to MC or to connect your decoder to a neighbours 5-2 switch.
If the decoder is okay then the only problem would be the 5-2 switch.
Did you do a factory reset maybe? Sure the network settings on the decoder are still correct?
Easyview, UEC 4T HD PVR, SD PVR, XV
Spare decoders: SD PVR(2), PACE HD PVR 4T, DSD 660, 1110, 1131, Explora
2 unmentionable FTA decoders
Win 10 Pro (64-bit) build 1607, version 14393.351
1.2m antenna, 8-way universal LNB, 2x6 MS, FSM permanently connected.