A "Hard Reset" solved my problem. What was reset, and what was the likely cause of the problem ?

[redgreen334]

System: Zenbook
Battery or AC: both
Model: Q409UG
Frequency of occurrence: once
Reset OS:
Screenshot or video: no
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Detailed description：Notebook cannot power on and shows black screen

[Falcon_ASUS]

redgreen334

1. System: Zenbook
2. Battery or AC: both
3. Model: Q409UG
4. Frequency of occurrence: once
5. Reset OS:
6. Screenshot or video: no

========================

Detailed description：Notebook cannot power on and shows black screen

A "Hard Reset" solved my problem. What was reset, and what was the likely cause of the problem ?

@redgreen334
Sorry, I don't quite understand your question. What is your problem now?
Notebook cannot power on and shows black screen?
Or is the problem has been solved by hardware reset?
Thank you.