For the past few months beginning around the time I switched to Win7, barely a lot of Flash, rendering something minor with my video editor (Sony Vegas for XP ), or running Media Center for a few minutes will cause the screen to abruptly fade to black, immediately followed by a hard shut down. This has happened probably a hundred times (yes, shame on me for taking so long to address this). Strangely when plugged in and on an elevated surface the fan is always revving precariously. However when unplugged it runs almost silently (though Flash video is choppier), and I can't remember it ever shutting down in this state. I've tried looking in the advanced power settings and found nothing significant to make it perform as though it was still on battery power when plugged in. The best thing I could find with people in the same situation had to do with the tx2500; HP released a utility to fix the BIOS to work with Win7, but it wouldn't do its work on my model. So... does anyone know what I can do to effectively fix the power settings, or say to HP when I send it in for the end of my 2 year warranty?