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exclamation mark on UCM-UCSI ACPIDevice

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HP EliteBook 840 G5 Notebook PC series.HP EliteBook 830 G5 Notebook PC series,HP EliteBook 850 G5 No
Microsoft Windows 10 (64-bit)

Device Manager Displays an Exclamation Mark (Yellow Bang) on UCM-UCSI ACPI Device


1) Type C chrager is not working

2) External monitor with Type is not working

3) Battery remains at one point it wont charge or discharge when it connected to Type C adpater.

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here is the solution provided by HP :


hope this help.



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