Hi meyerklose,
The issue might be with the system board. You may try the following steps and see if it works.
Drain the residual power from the laptop:
- Disconnect any external peripherals (flash drives, printers, external hard drives) from the computer
- Then remove the adapter and the battery
- Press and hold the power button for 10 seconds
- Reconnect the battery and the adapter
- Try to restart the computer and check
If the above steps do not work, then check the following LED indicators.
If you simply turn on the computer, you might see the above indicators flashing in a sequence. Make a note of the sequence.
Awaiting your response.