Samsung S27AM50 Series User Manual page 101

The problem
The PC screen does not appear or it
flickers.
A beeping sound is heard when my PC is
booting.
When the PC screen does not appear or the PC is not recognized, check the
power supply of the PC and then reconnect the HDMI cable between the PC and
product. When the symptom persists, check that the PC is in Sleep mode.
When the set resolution is not matched, the screen may flicker. For the PC
supported resolution, see 'Read Before Connecting a Computer (Supported
Resolutions).'
If a beeping sound is heard when your PC is booting, have your PC serviced.
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Try this!