I had a problem with my 861V2 recently too. I would be watching a movie and it would just soft reset and then continually soft reset. It was only solved by switching off and on - but the issue continually came back.

I tried to check settings with my laptop and an USB Com cable but even then the 861 seemed to not respond correctly.

I was on the verge of sending it back to Meridian UK but I had an idea that it may be a loose card. I remembered that the effect only surfaced when I had moved my 861.

So, I put the 861 on the dining room table and carefully pulled out every card. I reinserted every card and made sure that every card was FIRMLY back in place.

When I powered back on everything worked perfectly again and the USB Com port works correctly.

No trouble since either.

Marcus

Lounge: 861v4+ID40 (hardwired Cat 6), HD621, 2xDSP6000.2VC (l/r), DSP5500.2HC, 2*Jamo ARTina (rears), D2500, 556, 596P, PS3, Humax HDR-1000S
Bed 2: MD600 (hardwired Cat 6) , QNAP 453 Pro