The verdict from the dealer who has been working with JLR today to look at my car is that JLR suspect it is the DVB/DAB module and an incompatability problem with the channel tuning updates. No solution yet.

A temporary fix as pointed out by an Evoque owner is to set the TV to United States. Obviously this means the TV will not work, but it shouldn't pick up the tuning information. Appears to work (on the Evoque at least). 

Happening to me too in my MY12 RRS Lux... started noticing it on Saturday. 2018 RR Velar R-Dynamic, Silver/Ebony, Privacy Glass, lots of toys
2012 RRS HSE Lux SDV6, Orkney/Ivory, Privacy Glass, Side Steps and Tow Pack (Gone)
2008 RRS HSE TDV6, Stornaway/Ebony, Privacy Glass, Tow Pack (Gone)
1985 LR Series 3 SWB, Canvas Top, Firestone SATs (Gone)

Definately happened to me on the way home today 3 times in about 10 minutes (i blame the new sport i was next to trying to make me want it...but it did it again ) Mike

2014 Facelift Discovery

Thought I might see this problem today, but no.

I have just driven from Dartmouth up to Exeter along the M5 to Bristol, M4 then M25, M20 to the tunnel.
Listening to the DAB radio all the way and perfect reception all the way.

Must have been near a 4G mast at some point? 2023 P440e SE Dynamic on order -cancelled

2022 HSE Dynamic P400e

2017 Discovery 3.0 HSE Silicon Silver Nimbus interior and a few extra toys SOLD

2013 HSE Black, Orkney Grey, Ebony Seats and Ivory Interior SOLD

2006 HSE

Plus a few other cars inbetween!

Once mine had it out of its system it didnt do it for the rest of the journey - 15 or so miles, maybe 20.

Mines got the absolute latest equipment and software to. Mike

2014 Facelift Discovery

It's still doing it in Nottinghamshire, although not a frequently as it was this time last week.

Almost coincidently DAB reception around here has suffered with a number of significant black-spots. 

Reference SSM68017 Models:

Range Rover Sport / L320
Range Rover Evoque / L538
Discovery 4 / L319
Range Rover / L322
Range Rover Classic

Title: Audio Loss/Crackle Category: Electrical Last modified 05-Sep-2013 00:00:00 Symptom207000 Entertainment Systems Content

Issue:

Customer failure mode is an intermittent 1-2s loss of audio in any source, which then recovers but can happen multiple times.
The occurrences may vary depending on location and proximity to transmitters in the UK.

Cause:
The issue first occurred on Wednesday 28th August and corresponds with a change in the UK Broadcast for TV Electronic Programme Guide (EPG) feature.
This issue appears only to affect vehicles fitted with the Lear Hybrid TV module.
The broadcast causes the TV module to carry out a reset which results in a temporary loss in audio, irrespective of which audio function is being used e.g. (Radio, CD, etc).

Action:

As a temporary measure and with customer approval it is possible to mask this drop out by setting the TV region to USA. However, this does prevent the TV from operating but provides a quick although temporary fix until a more permanent resolution can be found.

1. No parts are to be changed in an attempt to resolve this issue.
2. Disable TV by selecting USA region from the touchscreen
3. It is essential to perform a successful shut down of thevehicle electrical system, by ensuring the ignition system is off and not used for a minimum of 5 minutes. This ensures the TV records this as a 'last good state' and that the new region is stored when the vehicle is powered on.
4. This is a temporary solution until permanent fix can be established. JLR will communicate this permanent fix as soon as possible. 

I changed the TV to the US yesterday and that solved the problem. Will be interesting to see what the permanent fix is - hopefully it is just a software update (provided free of charge!). 3.0 SDV6 HSE Dynamic, Corris Grey with contrast Santorini Black Panoramic Roof, lunar interior, privacy glass, upgraded Meridian system, cooled 18 way front seats, heated steering wheel, adaptive xenons, large screen wash bottle.

Gone: 3.0 TDV6 HSE, Santorini Black, Ivory/Lunar interior, grand black lacquer finish, HK Logic 7.1 Surround, Privacy Glass, Adaptive Xenons, heated steering wheel.

Gone: Jaguar XF Luxury, Pearl Grey, Dove Interior

@ Phil - I got exactly he same details from the LPR service team yesterday and changed the TV region last night, seemed to cure the problem on this mornings drive to the station

Note to anyone looking to do this: changing the region can't be done on the move.............apparently ..........

As you say, wonder what the long term fix is.  ON THE WAY: BMW F21 M140i
MERCEDES GL350 - Metallic Navy Blue w/Grey interior

GOING: BMW F31 335D MSport+ xDrive Touring
GONE: Land Rover Discovery 4 HSE - Stornaway Grey w/Black Interior (wish we'd kept it )
GONE: BMW F10 520D MSport - Carbon Black
GONE:MY12 RRS SDV6 HSE Sumatra/Ivory/Grand Black Privacy glass

i would put up with the disruption rather than loose the tv function i think Mike

2014 Facelift Discovery

Long term I agree Mike, but when it's just me I. The car commuting the TV's of no use anyway, so I'd rather have uninterrupted radio, than access to TV I don't use......and I can always change it back if the need does arise.

Hopefully the LR techs will come up with a fox/bodge/solution soon enough  ON THE WAY: BMW F21 M140i
MERCEDES GL350 - Metallic Navy Blue w/Grey interior

GOING: BMW F31 335D MSport+ xDrive Touring
GONE: Land Rover Discovery 4 HSE - Stornaway Grey w/Black Interior (wish we'd kept it )
GONE: BMW F10 520D MSport - Carbon Black
GONE:MY12 RRS SDV6 HSE Sumatra/Ivory/Grand Black Privacy glass

Obviously not when driving, unless i want to listen to something - but i must be the only one to use the tv all the time. Mike

2014 Facelift Discovery

so glad to read all this, as my RRS MY 13 just started as well.....thought it was me at first!
interested in the permanent solution now...

[quote="mse"]Thats correct, the red line through the grey cars shows no signal...i know that, mine works (i use it all the time) it just pops up intermittently since they replaced the entire unit (after they broke the last one)

Have to say on my MY 13 the TMC is off more than it is on!! Had no problem with it on the 2011 MY. Off most of the way up the M! and A1.....
any ideas?

Im going to try to talk to the dealer this week to book it in...its got to have their mistakes fixed and i need to find out why its gone from perfect on its TMC to this, following the latest update. Mike

2014 Facelift Discovery