I have a HP DV6000 laptop that will not power on. It will not power on without the battery either...What I call the 'dashboard' lights on the keyboard will light for 2-3 seconds and you can hear the slightest fan noise and then all goes dark (screen never lights up). With AC plugged in, the little blue light at the plug does light up as does the blue light at the lightning bolt charge icon...presumably indicating a full battery. What would be the first thing you would trouble shoot? I've tried removing and switching the RAM sticks with no luck...I'm good with computers just haven't done any laptop repairs and I'd rather not take it to a 'shop'. Thanks!