What to do if my Fujitsu Lifebook U939X suddenly stops working?
- SSusan BassSep 12, 2025
If your Fujitsu laptop stops working, it might be in energy-saving mode. Try ending the energy-saving mode. Another reason could be that an application program has caused the malfunction. In this case, close the application program or restart the laptop by restarting the operating system or switching the device off and back on again. Also, the battery could be dead. Connect the laptop to the power supply via the AC adapter and charge the battery.













