lenovo t400. After using the notebook, and putting it away. Now it will not start. It has not been hit by water or hit the floor. If the psu is connected battery and connector icons do not light. Pressing the on button does nothing. I have done the hard reboot. Nothing happens. I have removed the battery and ram. Pressing on button does nothing. Same if the notebook is connected to a docking station. Can it be about the cmos battery? It is not about the psu because connected to another lenovo t400, this notebook will work. Same about the docking station. What may be the error? Thank you.