When the battery is removed (and the power supply from the mains is disconnected) the machine should just stop. Restoring the power by re-inserting the battery and plugging in the "charger" should then permit the laptop to restart normally. Try disconnecting the power, remove the battery and hold the power switch down for 30 seconds. Leave the machine for 15-20 minutes, replace the battery, replace the mains power lead and try restarting it again. Please post back with how you get on.
EDIT - typos