I think that it's finally fixed:banana:
Rang up Matt at Technomate in the end as receiver was still losing audio/video no matter what patches I was applying.
This is what he advised me to do
1-turn off from rear and disconnect LAN cable
2. Connect receiver via scart lead to television.
2-Keep pressing front standby button on the front panel and then turn on from rear and wait.
3-You will see loader menu, scrawl down to factory reset and hit ok.
Apparently this completely clears all data from receiver.
Did all, installed firmware, phantom /add on patch, reconnected by lan and touch wood I have had no problems for over two hours!!!
Sounds to me that one of the original patches did not load 100% and somehow stayed in the receiver's memory, or something like that!!
Very impressed with technical help and customer service at Technomate, I've rang them a few times in the last few days and they always have been very pleasant and patient with me.