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.

Perhaps one of the most maddening things about troubleshooting modern tech -- be it phones, computers, or sometimes even game consoles-- is that there can be several culprits for the same problem.

As the Mac 911 columnist at Macworld, I’ve received hundreds of emails from people who have had Wi-Fi fail on their computers. In August 2016, I wrote a column that provided all the advice we had to ...