Hi,
Have you tried powering the laptop without the battery connected? If that won't work please do try these troubleshooting steps that may help.
- Try to boot the laptop into Safe Mode.
- From a complete shut down, turn it back on and keep tapping on F8 repeatedly until it shows Advanced Boot Options.
- Select Safe mode and press Enter.
- If loads Safe Mode, disable all your startup items.
- Press CTRL + ATL + DEL and select Task Manager then go to Startup tab.
- Disable all your startup items then reboot the laptop
- If it doesn't load Safe Mode go back to Advance Boot Options
- Select "Last Known Good Configuration" and press Enter.