Once the system powers off or enters sleep mode, the cooling fan increases its speed (possibly via ACPI settings).
Once the system powers off or enters sleep mode, the cooling fan increases its speed (possibly via ACPI settings).
Once the machine powers off or enters sleep mode, the cooling fan increases to maximum speed. When you try to shut it down, the screen turns black and the fans kick in. If you press the power button while it’s running, it restarts from where you left off. Even a short hold of the power button for 15 seconds causes a full shutdown but keeps the fans active. Leaving it on with fans running in battery mode will eventually drain the battery. This is the only method I know that completely turns the computer off. Notably, the device manager shows one item labeled as non-functional under the Universal Serial Bus controller, possibly related to ACPI, though Windows doesn’t recognize it properly (Code 43). The machine is an HP EliteBook 840 G3 with Intel 7200u and Windows 10 x64, running the latest updates. I’ve tried removing the battery, CMOS battery, performing a BIOS reset, reinstalling Windows, updating drivers from HP and Intel support, applying the latest Intel firmware, and installing new device drivers. My best guess is the problem lies with the drivers, firmware, or how the hardware manages power states. I’ve seen similar cases online, but none of my attempts resolved it. Anyone else facing this issue?