If your laptop loses internet connection when connected to an external monitor, you are not alone. While Wi-Fi problems are common, this could also be a glitch with the monitor or the laptop itself.
Even though the wireless connection status says that my connection to my AP upstairs is "Excellent", a click to a link or another of our forums fails and times out. No progress bar, just "Waiting".
If all of that checks out and your ISP shrugs when you call them and ask for help, it's time to stop guessing and start ...