As in teh subject: Was typing on the laptop when it just died. No smoke, no smell, still plugged in, battery was full. Now I get no LEDs to indicate it is even plugged in and it never gets to POST. I have tried reseating the battery, then I tried the 5 second flea power issue, then I tried powering on with only the AC plugged in. Nothing has given me any indication it is receiving power.
Well, I completely took it apart and put it back together, but had no power meter to check if the battery or AC adapter were connecting, but upon reassembly, the power returned and the laptop is functioning.