The Tuner in the BS3 based BV7-40 is a DVB-T/S, S for satellite.

It would not work for SKY, but should work for Freesat.

The current DVB-T/S module is not compatible with DVB-T HD. 

You'd need to change the module, but it was mentioned here that the new HD module is DVB-T only and not "S". 

I had to use mine last night to watch some kind of TV. The bad weather (I am assuming) messed up my Sky HD box, it froze compeltely and still didn't want to know after a reset. Got it back up and running again this morning after a hard boot. What a nightmare the DVBT was though; I was watching American Idol on ITV3 and the picture and audio were out of sync so much it made the dubbing in Bruce Lee films look good! The picture quality is as bad as SD quality on it and it lost sync virtuall every two minutes or so. I pressed the up or down arrow on the remote to change channel then change back again and this temporarily fixed the problem for about 2 mins only before it happened again. Honestly, sky boxes are rubbish, now it seems my only experience of a DVBT box is rubbish too ... who is developing these components? They're not even ready to be on the market. The quality testing must be awful. I find Sky particularly useless considering the cost of the whole package tallied against the amount of times it freezes and needs a reset.

Is using Virgin Media any better?

Simon.

So you have never had freezing problems Chris or had to reset? Last year I was back and forth to our dealers over a 4 month period trying to get this resolved. They did try moving the dish, they also replaced the box 4 times, 3 of them were reconditoned ones and the fourth was a brand new one which only now must be about 5 or 6 months old. Big Al and Jack both told me that Sky boxes are renound for freezing. They said they are constantly having to reset them in the dealership so clearly they do seem to have a reputation.

Simon.

Whilst I wouldn't expect anything to be flawless as such, I certainly do expect the boxes to behave a lot better than they do. Computers are built these days to be left powered on 24 hrs. Heat sinks, liquid cooling, fans and case design that controls air flow have all been designed for this purpose. Years ago you could not expect that but these days you can. You work in IT yourself so you know that Mainframes/Servers/Networked PCs etc are left running all the time - mostly for houskeeping/security backups overnight. I leave my Sony desktop powered on most of the time and its fine. Do I expect the same from a Sky box and DVBT module? Yes I do.

Having just done a quick Google search it is clear that there are a number of known problems with the boxes anyway. The most common seems a PSU problem. Here a couple of links I have just skim read:

link

link