BBC Four HD is part time, the fact that you got the message indicates that had it been broadcasting you could have watched it.

Total loss of all low band vertical yet the few high band vertical channels are present seems to suggest it’s your lnb has had it. Changing it is easy provided your dish is easy to get at.

Most and I guess yourself have sky-dishes of varying ages. Reason they are made in the millions and the dishes and lnb’s to fit them are very cheap especially on e-bay.

Also a guess you are likely to have a 4 output quad lnb.

The latest is the MK4 dish that has a different lnb fitting to the earlier dishes. The lnb is the same just the way it fits to the dish arm is different. A photograph of the lnb end of the arm would help to identify. In any case a lnb bought from e-bay with a legacy adaptor should fit all but the ancient MK1 dish. If you can’t safely get at the dish, you need someone who can.

navman2 – 2 minutes ago  » 

Picture 1

No picture. The lnb is normally secured with a pull out pin. Once the pin is removed and the f connectors are unscrewed it just pulls off the end of the lnb arm.

Unless the dish is really ancient this one should fit.

https://www.ebay.co.uk/itm/QUAD-LNB-WITH-LEGACY-ADAPTOR-8-F-CONNECTORS/322132791640?epid=2143089184&hash=item4b009c5158:g:KS8AAOSw4q9XTvGy

These might help

https://www.youtube.com/watch?v=y6oaaIOvv0c

navman2 – 26 minutes ago  » 

Hi Graham I hope these re-sized pictures are okay to identify my LNB.

Regards,

Barry

[attachment=63601,934] [attachment=63601,935] [attachment=63601,936]

Looks like a MK3. The lnb listed when fitted to the legacy adapter should fit. You might want to optimise the alignment slightly which is easy with the help of a friend if you dont get 100% signal and quality on a UK spot beam transponder like say BBC 1 HD. Post if you want instructions. There are 4 adjustments you can make.

Briefly

Focus moving the lnb back and forward in the collar

Azimuth – Direction the dish points

Elevation – The vertical angle of the dish

Skew – twist of the lnb – not critical note the existing lnb angle which is not vertical.

I recommend greasing the f connectors using silicone grease and using lnb boots – Easier than amalgamating tape.

https://www.ebay.co.uk/i/260666606374?chn=ps&adgroupid=52137191441&rlsatarget=pla-380309517331&abcId=1129946&adtype=pla&merchantid=7306854&poi=&googleloc=1007011&device=c&campaignid=974961043&crdt=0

https://www.amazon.co.uk/Servisol-701-143-Silicone-grease-50g/dp/B000L97ZPI

navman2 – 46 seconds ago  » 

Okay Graham i will order the unit you recommended on Ebay, plus the other bits and pieces. Just to clarify if I can undo the three cables then the unit left on the arm will be superfluous and if damaged when removing won’t matter as long as the arm from the dish is okay? Also is there any protocol for which ports the three cables are attached to when I fit the new one?

Thanks again, you have been extremely helpful.

Barry

The unit is the lnb. Yes it goes in the dustbin, or the greener metals recyling skip at your local waste disposal site

You can use any of the outputs they are all identical. Just use the ones easiest to tighten the 11mm f connector nuts. Check the coax carefully for any sign of water ingress or corrosion of the screen and centre core. If the f connectors are screw on type you can screw them off and clean up the connectors.

You may need to remove them anyway to fit the boots onto the cable.

http://www.satcure.co.uk/tech/fplugs.htm