Mysterious lost DVB-S transponders

Hi all, I am at wits end
Live in France, and have 2 motorised dishes one with VU solose and other with small giga box
About 3 weeks ago we had extreme rain here and also the TNT (french terrestial) frequencies changed - neither of which should affect reception
However since that time I cannot receive certain (but not all) TPs on Astra 2. Channels affected include Sky news, Yesterday and Dave, all of which are FTA on DVB-S
This has affected both systems which are independantly wired. and each has good reception on other channels both DVB-S and DVB-S2
I checked on Hotbird and similar TPs are also not working!
I have redone the wiring and replaced LNBs without success
Any ideas gratefully received
Toby

When you say you've re-wired, have you changed the whole run of co-ax from the dish to the receiver? It's possible (especially if the co-ax is old) that the outer sheath has rotted and some of the rainwater got in. That would certainly affect Sky News on 28.2°E as it is quite a hight frequency and more likely to be affected by cable issues.
Do you use diplexers for the TNT signal or a separate cable run?

1. Have redone the connections but not replaced the cables (yet)
2. The second system which is at the other end of the house and totally independent wiring wise has the same problem.
3. The comment about the high frequencies is interesting but only DVB S freqs are missing not nearby DVB S2.
4. I mentioned TNT in passing but again the cable is independent but I think I will go up in the loft and check for rain input as that is now not working.


Thanks for your reply

Treverton - have looked in loft and all cables seem ok

Will have to get someone out to investigate - ugh1

QUOTE="osbald16, post: 2669251, member: 97706"]Treverton - have looked in loft and all cables seem ok
Will have to get someone out to investigate - ugh1[/QUOTE]

They will look fine inside, it's outside where the damage occurs, then the water creeps along as the outer sheath acts like a hosepipe. I've seen several tuners destroyed this way.
I caught one just in time the other day; similar symptoms on a French TNT-Sat (19.2°) system funnily enough, some channels OK, other iffy or not working at all. The piece of cable under the LNB arm was fine, but where it is exposed behind the dish there were some tell-tale cracks. Just removing that foot or so of cable (there was plenty spare) got it all working again, it will get a new cable run once the current guests have left. I didn't investigate which transponders were affected though, I was just happy to get it going.

treverton - have replaced lnb cable - no joy - will try next section tomorrow

If you have easy access to the dish it might be better to run a loose temporary cable direct to the box before doing anything permanent, could save you a bit of time if the problem is elsewhere..

trevortron said:

If you have easy access to the dish it might be better to run a loose temporary cable direct to the box before doing anything permanent, could save you a bit of time if the problem is elsewhere..

Click to expand...

trevortron said:

If you have easy access to the dish it might be better to run a loose temporary cable direct to the box before doing anything permanent, could save you a bit of time if the problem is elsewhere..

Click to expand...

Well have run a new cable from stb to motor - no change
Went then all way to LNB and still no change. Changed LNB and still no change. Totally weird.