Samsung Odyssey g9 Screen Problem

Thank you for contacting Samsung KSA

dear make sure that your device charged enough

check your device in the safe mode

try to restart your device and re-check again

kindly visit the nearest service center in order to check the device

the link to find the nearest service centers :

https://www.samsung.com/sa_en/support/service-center/

or you can provide us in which city you are located to provide you the available service centers