After used the notebook about two years, currently the machine can't start up when plugged AC power.
When plugged AC power and press the start button, the power blue led on, but other led (cap. letter etc) wouldn't light on and the screen keep in dark, even doesn't show the bios screen
But when use the battery only (without AC), the machine boot up normally. After boot to Window 7, pluuged the AC power can show that the battery is charging.
Anyone had experience on this case?