Very recently, I let my laptop (HP) battery get too low, and it died on me. Usually, upon plugging in the adaptor, everything starts right back up again. However, this time, the laptop runs, but all I can see is a black screen. I can even hear the little chime when windows starts (vista), but all I can see is black. I don't think it's a backlight issue, as I the black screen still emits a sort of "glow". I know I need a new battery, but as long as it's plugged into the power supply, shouldn't it work fine? I've already tried the electro static discharge several times (unplugging power and batter, then holding power button for 60 seconds) as was suggested by most forums that I read. This didn't work at all. I'm just wondering what it could possibly be, and if there were any easy fixes to this before I took my computer into a professional?