I have an S2417DG monitor and I'm having the same issue as these 2407WFP. Doing this only seems to solve the problem temporarily.
Started a new thread. That thread was old and dealt with a different monitor model. The instructions for the 11 year old 2407WFP will differ fom your S2417DG.
"Doing this only seems to solve the problem temporarily."* Doing what exactly?
* Is this an "out of box" issue?* When was this monitor purchased?* Was this monitor purchased directly from Dell?* What is the 20 digit s/n and A0x revision? Check the back label