Hi jayliao,
You didn't provide the exact model name of your unit. Kindly perform a power cycle to isolate the issue:
Remove the battery and all peripherals -> press and hold the power button for 5 seconds OR, if the battery is not removable, remove all peripherals -> look for a battery off button on the bottom of the laptop -> push the button for 5 seconds
If the issue is not resolved, service may be required:https://esupport.sony.com/US/p/service.pl.
Regards,
Vincent
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