I've a lenovo T61p. It came with a advanced-docking station without security key! So I have to use it with the attached advanced docking station. Unfortunately, this T61p dropped from my bed and gosh it was dead! :-( Even I couldn't be able to run it on AC. There was no power plug signal. The battery was completely dead and I thought that its all gone. I read several message posts on different forums and found that if I undock my laptop there is a chance that it may start. I went to a lock smith to open the lock for me and he opened it in just a few seconds. I came home, ejected the laptop battery and when I plugged the power to my T61p it started! Then I then tried to recharge the battery and it also started to recharge :-) Its running perfectly now. Hope this post helps you in some way. Good luck!