Please follow the instructions below.
1. Please disconnect the AC adapter.
2. Remove the battery from the laptop.
3. Leave it like that for at least 5 minutes.
4. Press and hold power button down for at least 30 seconds.
5. While the battery is out, connect AC adapter back in
6. Try to turn the laptop on.
7. No lights on the laptop? This suggest blown fuse or fault with AC adapter, please replace fuse to confirm.