Input 2 No Signal

[GMcDowell1]

A while ago I suddenly lost signal on SkyHD box. On inspection the LNB cover had gone and it was open to the elements so I presumed this was the problem and replaced it.  New one was slightly different (Labgear 4 feed replacing a Sky 4 feed) but it went on ok. Reconnected everything and ever since I've only been able to get signal on input 1. This of course means no recording while watching and limited EPG Have tried new cable direct from dish to box and get the same result, I've also tried the input 1 cable which works in each of the 4 LNB outputs and they procuce a signal so assuming the new LNB is fine. Have also tried a completely different sky box (newly refurbed from EBay) and still no input 2 signal.  Basically I've tried everything (I think) and can't seem to resolve it.  Any other ideas???

[Annie+UK]

May be the line 2 cable has been water damaged

[GMcDowell1]

Tried a brand new twin cable with new connectors - same result.

[Mark39]

Replacement Sky box, new cable and connectors = same result.

LNB issue? Is it a quad, not a quattro (only a wild guess)?

[GMcDowell1]

LNB is a new Labgear Quad