Hello there! I am Charity, I'm an Independent Advisor. I'm glad to help you today!
My apologies about that. May I ask if you have tested the monitor on a different device to check if it's a monitor defect?
Kind Regards,
Charity
Please note that things might need more than one reply to completely resolve your issue, as it will completely depend on the complexity of the question and the amount of detail that you have provided me.