I have a IBM ThinkPad T42 that will not turn on. When I press the power button all the lights light up green. About a second latter all turn off except 2, one of which is the battery and the other is the power. The laptop then begins to beep. A few seconds after 3 lights turn off the battery light turns yellow and the power cable is still green. Any suggestions on what my problem is and how I can fix this?
UPDATE: There are no CDs in the tray. There are nothing plugged into USB or anything else (other than the power cable).
I have tried to start without the battery. The power light is green but it still makes the beeping sounds and does not start.