@WainingWorld
Welcome to HP Support Community
This seems to be a hardware problem with the monitor
I suggest you contact HP Support for Service Options
1) Click on this link - www.hp.com/contacthp/
2) Select your product type below.
3) Enter the serial of your device.
4) Select the country from the drop-down.
5) Select the chat or get phone number options based on your preferences.
6) Fill the web-form and proceed further.
Thank you
KrazyToad
I Am An HP Employee