How to Test Power Management Hardware on a Laptop

You can test your laptop’s power management hardware. However, keep in mind that if you find a power management issue, you will have to hand your laptop over to the manufacturer (or wherever) for repair. But at least you will know that your laptop problem really needs the services of a professional when you get the bill.
ACPI laptop hardware has its own BIOS, which means that, like other BIOSes in the system, it runs its own tests and diagnostics when the hardware is first started. So the first place to look for a problem with power management hardware is your computer’s startup screen, where you may find many startup or ACPI error messages.
Another way to test power management devices is to use the System Information utility. Since some laptop manufacturers poorly implement the ACPI standard, conflicts may occur that the System Information utility may detect. Follow these steps:
1. From the Start menu, choose All Programs → Accessories → System Tools → System Information.

2. Click the plus sign (+) to expand the list of hardware resources on the left side of the System Information window.

3. Choose Conflicts/Share.