HP/Compaq :: Envy 15 Black Screen

I've spent a while now reading through the forums for both the 1st and 2nd gen 15" Envys. My first gen Envy, purchased 3 weeks ago suffered the dreaded black screen issue, which was identified by turning the machine on and leaving it for a while - could be 10 minutes, could be hours and the screen would go black, system would lock up and require a hard reboot. Oddly enough the hard drive packed up after a couple of weeks use. I replaced the drive myself with a new western digital Scorpio, but the symptoms still occurred.

Having bought the unit from a retailer, I took it back and had the last remaining gen 1, which was their display unit (i prefer the lower res screen for gaming-better performance at native res). To date I have not had a single black screen. The drivers and software are exactly the same, which kind of ruined my idea that it may be drivers causing the issue, so I'm very intrigued as to what may be causing the issue.

I'd like to keep this thread solely to covering this issue as it seems to be affecting users of both first and 2nd gen units, so feel free to post your experiences of this exact problem and any remedies you may have discovered, as it took me ages to find like minded users in the massive general Envy threads! Maybe we can get enough information to help the Hp techs, as I really think this unit is otherwise a very good performer!