LG SmartTV Satellite Signal no longer received

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colnic

7 posts

Wannabe Geek

#229094 7-Feb-2018 15:27

Hi all,

Our then new LG 55UJ654V SmartTV and our existing PVR set-up has been working since August 2017 when the SmartTV was originally purchased (see online registration details) and set-up in this configuration.

The set-up is the with SmartTV connected to the ex-Sky dish via a Splitter (diode protected), along the PVR to receive the Optus1 satellite signal.

Just recently, the SmartTV no longer receives the satellite signal for some reason.

The problem started about the end of January 2018 "for real apparent reason" after working since August 2017 when the SmartTV was originally purchased and set-up.

I have some technical knowledge, so I started to diagnose the problem.

The LNB/satellite dish was an older Sky set-up and uses a 10750MHz LNB, it previously worked with a Sky Decoder, so there was no reason to change.
When the PVR is powered ON or set to STBY mode, the satellite signal is then received by the TV. If the PVR is OFF completely, there no satellite signal received by the SmartTV. A Satellite Signal Test meter I've purchased confirms this.
Bypassing the Splitter and connecting the SmartTV directly to the satellite cable feed and turn ON... is still no satellite signal received.
There is no short on the cable (tested with multi-meter and besides, the PVR works okay)
Replacing the 10750MHz LNB with a new one makes no difference to the problem.
The Satellite Signal Test meter indicates that there is no 13v or 18v feed from the LG SmartTV satellite port.
The original PVR tests okay with Satellite Signal Test meter and has a 13/18v feed along with a strong signal received from the new LNB.
The LNB power option in the Satellite set-up on the SmartTV is ON for the 10750MHz LNB. This has not changed since set-up back in August 2017 when it was working (received a satellite signal).
All other features and functions on the SmartTV are okay and firmware updates are applied when available.

So to me it looks like SmartTV satellite polaristion power is not working...

I could have the PVR on STBY mode to power the LNB, but this just is a get-around.

Any ideas? LG Support hasn't been any help so far...

RunningMan

7964 posts

Uber Geek

#1953049 7-Feb-2018 15:47

Your "diode protected" splitter only passes power to the LNB on one leg, so the LNB is powered by the PVR. Turn the PVR off, no power to the LNB.

It's not an LG problem - you need a splitter with power pass on all ports.

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wellygary

7381 posts

Uber Geek

#1953060 7-Feb-2018 15:58

RunningMan:

It's not an LG problem - you need a splitter with power pass on all ports.

But when he runs the feed straight from the dish to the TV there is no power being fed to the LNB,

To the OP: What happens if you toggle the power feed option when its directly connected?

Possibly an update might have borked the power feed option on the TV?

Can you do a reset to factory settings on the TV ? if so you should be able to replicate the situation (software wise) you were in when it was installed?-

if the problem is still there you will likely need to lodge a fault with LG, "there is no power feed from the TV to the dish"

RunningMan

7964 posts

Uber Geek

#1953062 7-Feb-2018 16:01

wellygary:

But when he runs the feed straight from the dish to the TV there is no power being fed to the LNB,

Very true!

Voltmeter on the cable from the TV to check for 18vdc?

B1GGLZ

1961 posts

Uber Geek

#1953122 7-Feb-2018 16:32

colnic:

The Satellite Signal Test meter indicates that there is no 13v or 18v feed from the LG SmartTV satellite port.

So to me it looks like SmartTV satellite polaristion power is not working...

I agree. It looks like the power out from the TV to the LNB has failed.

Time to return it for repair?

colnic

7 posts

Wannabe Geek

#1953131 7-Feb-2018 16:56

Great, its exactly what I've concluded... the power out from the SmartTV (now notsoSmartTV) to the LNB has failed and its time to be repaired.

Thanks to all who contributed.

The SmartTV is in warranty and if I can get some info on the failure, I'll update this thread.