Land Rover Repair: 09MY Range Rover TSD dies when driving, front entertainment, network failure

Question
A 09MY rang rover,the Screen dies ,no logo,just like it's turned off.
I have refresh Front entertainment control module with the IDS (118 DVD),and the Audio front unit,CD module,etc
And I have disconnect the battery after remove the key 2 minutes later.
when viewing DTCs,I noticed that modules of entertain system,such as audio unit,CD player,telephone,and tire pressure monitor system,can't be read,
thank you very much

Answer
I would suggest disconnecting the head unit and then plugging it back in and reloading the system.  This has often worked for me.  However, I have not encountered the communication failures that you describe.  If they persist, check the DTCs and they should tell you the cause of the failure, e.g. CAN/BUS network failure, etc. and you will have to pursue it from there.