![]() Update and confirm BIOS / Windows packages / drivers with the latest version in your laptop If the problem persists, please continue the next troubleshooting step. Try to reset BIOS to default settings, here you can learn more about How to restore BIOS settings. Re-install the AC adapter and battery, then power on the computer and check whether the problem is resolved or not.Press and hold Power Button for 40 seconds to do Hard reset. ![]() Remove the battery (if it is a removable battery pack).(These models need to plug in the AC adapter to do the Hard reset process.) Note: Please don’t remove the AC adapter for ASUS laptop TP420IA and UX425IA model. Please remove all external peripherals, such as external hard drives, printers, memory cards, external ODD (if your computer is with internal ODD, please remove CD/DVDs), dongles, etc.Reinstall ASUS System Control Interface driver.Update and confirm BIOS / Windows packages / drivers with the latest version in your laptop.Troubleshooting - How to fix keyboard backlight problems
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