I have never had any issues with my S2718D monitor until it didn't turn on recently. It connects via USB-C to my MacBook Pro

It is displaying the following message: "Please check if the power plug is inserted properly or if the correct power adapter is used."

I have never changed the power adapter which appears to be working fine. I have tried to troubleshoot based on what I can find online but nothing has worked. In "Read this before posting," I tried the methods that I could. I am unable to factory reset since I cannot download the MS application on provided on Mac, and I cannot get past the current screen.

The warranty is expired and Dell support is unable to offer me any help over the phone. Does anyone have any advice?

I bought this for nearly $400 with the expectation that I would be able to use it for more than three years.