Not ignoring your suggestion, Dan, just don't understand. It's not the monitor that's quitting, it's the laptop. Get the same black screen on the laptop as on the remote monitor.
If you really have reason to suspect the monitor is causing the failure, your suggestion would certainly work, but I'd hafta use that little bitty screen on the laptop for........how long? Maybe days? Or weeks? Or months? Not sure I can stand the pain, and if it never quits again for six months, would I even know I fixed anything, or if it just hadn't decided to fail again?
So, do you have actual knowledge you're withholding? Or do you just wanna see me suffer for a while?