ZenBook UX391FA does not detect external monitor

[amylin]

System: Window 10 pro
Battery or AC:
Model: ZenBook UX391FA
Frequency of occurrence:
Reset OS:
Screenshot or video:
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Detailed description：
I bought Samsung curving monitor and tried to connect it to my ZenBook UX391 via HDMI and USB C connection, my ZenBook did not detect the external monitor.
Please advise how this problem can be fixed?
Thanks.

[Blake_ASUS]

Hi there,
Can I have the model name of the monitor?
Thank you.

[amylin]

Samsung LC32R500FHNXZA 32" Curved LED Monitor 1920 x 1080, 4ms (GtG), 75Hz HDMI, VGA

[Blake_ASUS]

Hello Amy,
Are you using the HDMI to HDMI cable that the monitor came with to connect the laptop and the monitor?
After you connect the monitor, can you see the new monitor from device manager?
If not, do you have another cable or another monitor to cross check?
Thank you.