I'm having trouble with my HVR 3000 - I've just moved it into an older mobo+cpu setup I've finally bought a case for (It had previously worked on my desktop PC flawlessly), but I am having serious issues trying to tune it using mediaportal or the supplied hauppauge software.

Basically, the issue is that the LNB setting I have always used for my satellite  dish is 11,300 MHz, but when using this setting to scan 12,456 and 12,483 MHz results in neither being picked up.

Setting the LNB to 10,500 MHz picks up channels on 12483 MHz (and a bunch of others if I scan the entire optus D1), 9 in total. The problem is that it picks up the same 9 over and over, about 5 or 6 times at varous different frequencies (They are all encoded sky channel,s such as Alt TV and others which I don't recall).

Is this symptomatic of anything? Possibly faulty card or otherwise? I tried changing PCI slots on the motherboard and have installed both XP and Vista with the same results. Using the drivers that have always worked for the card. Not sure what else to try.

/Edit

Just realised that 10500 is irrelevant and there is obviously something wrong (as even if I had a new dual sky LNB, it would be at 107500 anyway).

Is there any way of specifying for mediaportal (Or mythtv for that matter) to power the LNB (ala GBPVR)?