When plugged into AC, power light on laptop flashes fast, blue. Power button controls nothing. Pressing "END" on the keyboard brings life to laptop (keyboard backlight, fan, and CD drive sounds like it initializes).
Battery is OUT of the laptop, will not work with just the battery. Battery is fine. Tried with another battery and another AC adaptor. Tried resetting the power supply. No difference in symptom.
Have removed HDD and Memory, replaced the CMOS battery. No change. No POST codes.
Motherboard dead? This unit did power on once plugged into AC.