Some feedback for everyone who have been kind enough with suggestions.
I have just comeback from my brother's house after spending the evening there chasing red herrings!
1.We gave my brother's laptop a fixed ip setting, lost sound and then picture after about 20 minutes.
2. We assigned a fixed ip address to Techno -ditto problem within ten minutes.
3.Disconnected lan cable from box, tuned in to a free to air channel, same poxy problem within a quarter of an hour!!!!
4. Swapped his receiver for mine, connected by lan again with a DHCP address, watched second half of footie on you where, not a a single glitch for over an hour.:banana:
5.Have left my receiver at my brother's for the night and brought his up to mine for a couple more tests before we send it back for exchange.
I am going to factory reset and patch with Techonmate's latest firmware then test on a free to air channel just to satisfy myself that I didn't load receiver with an iffy patch to start with.