Yes to infra red, checked that in my phone camera and it does work when the box is on (and off if only off for a couple of minutes).
I am in contact with Humax, but they're putting me through the usual steps so far. Just wanted to see if I borrow the minds and experience of the folks here before sending back, but sounds like it is indeed a faulty box.
Sad days! Especially as I got this to replace a Humax YouView box bricked by the latest update 6 months out of warranty (already gone through all troubleshooting right down to replacing hard drive, but it is as dead as a dodo!).