A hard reset does not remove any local files or settings.
Press the power button and refresh button for five seconds. The computer turns off, and then turns on again.
If necessary, press power button again to turn on the laptop.
If the issue persists
Factory reset the Chromebook.
Click the Taskbar on the bottom right, and then click Settings. Click Advanced at the bottom. Scroll down to the Reset settings section, and then click Powerwash > Restart. After the restart, in the box that appears, click Powerwash, and then click Continue.
I hope that helps.
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