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- After updating the BIOS the notebook works only from the bat...

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03-01-2024 10:59 PM
After updating the BIOS firmware to T76 Ver.01.15.02, when turning on the HP ZBook Firefly 15.6 inch G8 Mobile Workstation PC IDS Base Model with the power supply connected to the AC mains after booting the operating system, the notebook works only from the battery and does not switch to work from the power supply. To switch the notebook to power supply operation it is necessary to either disconnect and connect the power supply connector from the notebook or disconnect the power supply from the AC mains, wait for a minute for complete discharge of capacitive elements of the power supply and reconnect it to the AC mains. This happens every time the notebook is turned on. In addition, after updating the BIOS firmware to T76 Ver.01.15.02, the battery is completely discharged when the notebook is stored in the disabled state (not standby mode, not hibernation, but completely disabled). The battery was checked by means of HP and recognized as serviceable, the battery capacity is enough for 6 hours of remote schooling (checked after the notebook did not switch to work from the power supply). After installing BIOS T76 Ver.01.09.01 firmware, when turning on the notebook with the power supply connected to AC mains after booting the operating system, the notebook works from the power supply as it should be, but in the BIOS T76 Ver.01.09.01 menu there is now an item "Disconnect battery at next power on" which is inactive and it can neither be turned on nor off. While I was dealing with the problem by my own efforts on the HP download site for HP ZBook Firefly 15.6 inch G8 Mobile Workstation PC IDS Base Model, the BIOS firmware Ver.01.15.02 disappeared from the list of available downloads. What do I need to do to restore full functionality of the BIOS and what firmware version should I install for correct operation of the notebook power system?