Hi Richard,

This may only end up as one step in several of trobleshooting, but it's worth it for you to take this approach. Disconnect the monit(or and take it to a neaby friend's house (wo serves good cocktails) and connect the monitor to his/her conputer. Ids the same symptons present themselves in in a few minutes, you've unquestionably narrowed the problem to the monitor, and it means it has elements inside that have worn to the degree that a new monitor is advisable.

If your monitor performs just fine and at some appreciable length of time that this seems the inescaple conclusion, you immediately know that your computer is heating up at the video/processor area and shutting off all video presentation in order to reduce heat and save the mainboard/motherboard from a meltdown of the tiny circuits in that area using the inbuilt heat sensor and auro-shutdown feature it contains.

I apologize for your issue not being addressed sooner. The techs here realized that there's no instant gratification in a "solution" like I've written, so they moved on.

Therefore, please refrain from giving me 2 thumbs up while you go and carefully get this figured out. 2 thumbs reduces my rating percentage for telling you the exact way to find out about your problem for free. I prefer you leave no feedback until you do so.

Kind Regards,

TeSelkie