If you enter the wrong password three times, the ProBook 650 G5 will generate a "System Locked" message with a halt code (often 8 digits).

Conclusion For legitimate owners, the safest path is official support or an authorized service center. Hardware methods (CMOS battery, service pins) sometimes work but carry risks; firmware/EERPOM reflashing and advanced board work are high-risk and should be done only by experienced technicians.

Before you found this exclusive guide, you probably tried these. Stop doing them: