View Full Version : VU+ Duo receiving no signal
Okay this has been baffling me and my mate for a few days and we have tried a number of things. We're trying to take a single feed from a a normal Sky dish that currently has 3 other sky boxes connected to it and are all working fine. When we run the cable into my flat of which we've tried 3 different cables to be sure that wasn't the fault, we get no signal whatsoever.
I then brought my VU+ Duo into the main house where the other 3 boxes are and did a scan and it's working fine. We tried disconnecting all the other boxes in the house from the Sky dish and only having the one connected to my VU+ Duo but that did nothing to help either.
The only thing I can think of is there's some kind of a booster when it's run into there main house? If anyone has any idea as to the problem I'd appreciate your help! :thumbsup:
abu baniaz
29-06-17, 18:25
Does this other property have an LNB for Sky Q?
abu baniaz
29-06-17, 18:28
The Duo has two tuners, have you set the tuner with no wire connected as "not configured"
Does this other property have an LNB for Sky Q?
No there's no LNB for Sky Q and I just put tuner B to not configured but I have been trying both of them every time we made a change to wires.
abu baniaz
29-06-17, 19:14
The other three receivers, where do the signal wires come from? Direct from LNB or loft?
How are you running the cable?
Is is directly from a spare connector on the LNB to your flat?
Is it from a connection to your mates house and then to your flat by way of an extension cable? If via an extension how are the cables joined?
Are the cables you are using to your flat home made and if so what cable did you use, and have you performed a continuity check on the inner and screens?
By the way, is this that same building where you are sharing the dish/lnb
How are you running the cable?
Is is directly from a spare connector on the LNB to your flat?
Is it from a connection to your mates house and then to your flat by way of an extension cable? If via an extension how are the cables joined?
Are the cables you are using to your flat home made and if so what cable did you use, and have you performed a continuity check on the inner and screens?
By the way, is this that same building where you are sharing the dish/lnb
Running the cable directly from a spare connector into my flat. The cable was stuff I got from ebay 5 years ago that I used in my old house that always worked fine. We then took some of the shotgun cable that wasn't being used and tried that so it definitely isn't the cables fault.
I haven't performed a continuity check because I'm not sure what that is? I don't know if the cables are running directly into the loft or if there just direct from the LNB.
It's not the same building but there right beside each other. The sky dish is right outside my flat.
Would anyone have any idea as to what might be wrong?
Connect the duo to a different output on the lnb - its quite common for 1 or 2 outputs to be faulty.
Connect the duo to a different output on the lnb - its quite common for 1 or 2 outputs to be faulty.
I tried all 4 and none of them worked. We disconnected all of the other dishes too.
just rechecking all other working boxes are on 28.2 and not on other sat?
just rechecking all other working boxes are on 28.2 and not on other sat?
I scanned in their house on 28.2 and I got all the channels just fine.
so that was one of the other feeds which work ok and rules out dish aligned and not an internal cap issue,which brings back to your feed cable from where:confused:are the f connectors the correct size for cabling and rechecked again in back of box,a number of times i lost a tuner and cable needed a tweek to get a connection.
Ya they fit nice and snug and were the same fittings I used in my old house when I ran a cable straight from the dish to the Duo. We tried three different cables btw including some of the shotgun cable that Sky had used and still not even a bit of signal. Would an inline signal amplifier work?
Would anyone have any idea as to what might be wrong?
If its running of a Sky Q system its the LNB its not a universal type that you need on a VU+ Duo or Duo2. The `Q` system has a special LNB no good for Duo/Duo2. I think this is the problem...........
should not need it and is it for sat or cable,uk or irl should not need amplification,have you tried a different box on your feed.
should not need it and is it for sat or cable,uk or irl should not need amplification,have you tried a different box on your feed.
Haven't tried a different box. Let me go get one now.
Also the dish was installed in 2011 so it's not for Sky Q.
It's for just the normal free view sky channels. Is that Sat or Cable?
Haven't tried a different box. Let me go get one now.
Also the dish was installed in 2011 so it's not for Sky Q.
It's for just the normal free view sky channels. Is that Sat or Cable?
A process of elimination
i) You say that scanning for channels in your friends house using your box works so this rules out the configuration and the working of your box.
ii) You say that you have tried 3 of the 4 connections in your friends house. This says that 3 of the 4 LNBs (or 3 outputs from a switch) are working but it doesn't rule out the 4th being unconnected and/or being broken.
iii) You say that you I tried all 4 physical outputs from the LNB and none of them worked but then you also said disconnected all of the other dishes too. Was this a typo in what you meant that you disconnected all outputs from the LNB to try your single cable on each of the LNB outputs?
My two guesses
i) It's not a quad LNB but a Quatro LNB and your friend has a switch in his loft space.
http://www.systemsat.co.uk/blog/what-is-the-difference-between-quad-lnb-and-quattro-lnb.html
ii) The F plugs on your cable are incorrectly fitted and the screen is not connected (probably only true if you have recently fitted them yourself) . This means that the control signals from your box are not being sent up to the LNB
http://www.satcure.co.uk/tech/fplugs.htm
What do you get if you go to the friends house and instead of plugging in his the cable directly to your box you use a coupler/barrel connector to join your cable to his and then plug your cable into your box?
https://www.amazon.co.uk/Satellite-Socket-Inline-Barrel-Connectors/dp/B004PWCMKA
Have you tried your friends box in your location using your cable?
Assuming the UK, sharing a dish may have some safety aspects as the mains supply phase in your house may be different from the mains supply phase in your friends house. The problem can occur if one of you has a major fault and one piece of the equipment becomes live. In a communal system this is mitigated by bonding all the cable screens in one central point to earth. This doesn't normally happen in a domestic property where the house/flat is on a single mains phase supply.
Haven't tried a different box. Let me go get one now.
Also the dish was installed in 2011 so it's not for Sky Q.
It's for just the normal free view sky channels. Is that Sat or Cable?
i would think freesat =open channels on sat
freeview is open channels by aerial.
A process of elimination
i) You say that scanning for channels in your friends house using your box works so this rules out the configuration and the working of your box.
ii) You say that you have tried 3 of the 4 connections in your friends house. This says that 3 of the 4 LNBs (or 3 outputs from a switch) are working but it doesn't rule out the 4th being unconnected and/or being broken.
iii) You say that you I tried all 4 physical outputs from the LNB and none of them worked but then you also said disconnected all of the other dishes too. Was this a typo in what you meant that you disconnected all outputs from the LNB to try your single cable on each of the LNB outputs?
My two guesses
i) It's not a quad LNB but a Quatro LNB and your friend has a switch in his loft space.
http://www.systemsat.co.uk/blog/what-is-the-difference-between-quad-lnb-and-quattro-lnb.html
ii) The F plugs on your cable are incorrectly fitted and the screen is not connected (probably only true if you have recently fitted them yourself) . This means that the control signals from your box are not being sent up to the LNB
http://www.satcure.co.uk/tech/fplugs.htm
What do you get if you go to the friends house and instead of plugging in his the cable directly to your box you use a coupler/barrel connector to join your cable to his and then plug your cable into your box?
https://www.amazon.co.uk/Satellite-Socket-Inline-Barrel-Connectors/dp/B004PWCMKA
Have you tried your friends box in your location using your cable?
Assuming the UK, sharing a dish may have some safety aspects as the mains supply phase in your house may be different from the mains supply phase in your friends house. The problem can occur if one of you has a major fault and one piece of the equipment becomes live. In a communal system this is mitigated by bonding all the cable screens in one central point to earth. This doesn't normally happen in a domestic property where the house/flat is on a single mains phase supply.
Yes that was a typo I meant to say I disconnected all other outputs. I have tried 3 different cables and I looked up how to wire an F connector and did it to the letter. I have also done them in the past in my previous house and they always worked fine. We even tried a bit of cable that they weren't using anymore that was previously working in their house.
I tried another sky box from my own house and that didn't work either. The switch in the loft space sounds likely. Can I do something to recreate that in my flat?
Yes that was a typo I meant to say I disconnected all other outputs. I have tried 3 different cables and I looked up how to wire an F connector and did it to the letter. I have also done them in the past in my previous house and they always worked fine. We even tried a bit of cable that they weren't using anymore that was previously working in their house.
I tried another sky box from my own house and that didn't work either. The switch in the loft space sounds likely. Can I do something to recreate that in my flat?
On second thoughts: If there was a muti-switch in the loft space 4 of the LNB outputs would be connected to it. Were there 4 connections from the LNB going to the loft?
If there is a switch in the loft space there are probably spare outputs on that - you could connect your single cable to a spare switch output. If you are lucky there could be more than two spare outputs on the switch.
On second thoughts: If there was a muti-switch in the loft space 4 of the LNB outputs would be connected to it. Were there 4 connections from the LNB going to the loft?
If there is a switch in the loft space there are probably spare outputs on that - you could connect your single cable to a spare switch output. If you are lucky there could be more than two spare outputs on the switch.
Yes all 4 were going into the house but I still haven't asked the owner whether there's a switch in the loft or not. Why won't it work by just taking a cable straight from the dish?
Sent from my ONE A2003 using Tapatalk
Yes all 4 were going into the house but I still haven't asked the owner whether there's a switch in the loft or not. Why won't it work by just taking a cable straight from the dish?
Traditional universal LNBs have 4 modes of operation which your box controls by sending a control signal back up the connecting cable [High voltage, low voltage, tone and no tone].
If it is a Quatro LNB then these 4 modes of operation are fixed in the LNB and each mode of operation is available as a separate output - hence requiring 4 outputs. These 4 signals then go to a multi-output switch where the individual outputs of the switch are controlled by the boxes connected to them. It was a way of distributing a satellite signal to more than 4 tuners but without having to have more than 4 LNB outputs.
If you directly hi-jack one of the outputs from a Quatro LNB at best you would only be able to get the signals associated with that mode of operation (possible a quarter of the channels if you were lucky) BUT you would also deprive your friend of those channels.
Bear in mind that this is still speculation until you can confirm what is, or what isn't, in the loft
Recent technology advances can achieve distribution in a different way but as you say the dish/LNB was installed in 2011(ish) so its not new technology.
It's not Q the OP answered that earlier and all channels were found in one location.
abu baniaz
01-07-17, 20:32
The location that work is presumablly one served from the switch.
It's not Q the OP answered that earlier and all channels were found in one location.
What is being described above isn't Sky Q. Its based on technology that's been around for a decade or more. The OP doesn't know how the cables are connected in the loft, or to what.
All channels could be found in the original house if a Quatro LNB and a muti-switch is used. What would break this set-up would be to remove one of the inputs to the switch and route it to an adjoining property.
unsure about the switch theory but are there any other sat dishes on property as i have 2 fixed and motorised in conjunction with a 4 way switch?
duo should work on cable direct from lnb to box and have you checked in tuner for a signal on another sat as it is getting common now to move dish to a better sat.
I'll probably just put up a new dish for my property as it's too much hassle for myself and the owner to be digging in their loft honestly. Thanks for your help guys
I just want to give an update on this. I got a guy out and I told him everything I did and he went up to the dish and had a look at the f-connector that I had prepared and did it again himself which then sorted the problem!
He said a little bit of the wire was exposed and that it was touching another cable coming from the dish going into the main house.
Thanks for your help guys.
I just want to give an update on this. I got a guy out and I told him everything I did and he went up to the dish and had a look at the f-connector that I had prepared and did it again himself which then sorted the problem!
He said a little bit of the wire was exposed and that it was touching another cable coming from the dish going into the main house.
Thanks for your help guys.
Didn't you say that you had tried more than one cable?
Didn't you say that you had tried more than one cable?
Yes I tried 2 other different cables but they both had the little bit of wire coming out. He said it was 2 strands that were touching the other cable.
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