Do you have another monitor to try on this system?
Its a monitor mode that its going into and message isnt from computer. Curious if its monitor issue of pc issue, if able to try PC on a different monitor we then can determine if its the PC or Monitor... also do not use the same video cable between monitors, it can be a video cable failure too in which using same bad cable would give same results between 2 displays giving a false direction to go in thinking its the PC when its the video cable.
