On 2 occasions I've plugged the AC charger and an HDMI cable (extension to HDMI-to-VGA adapter to VGA monitor) into my back-up laptop, then tried to switch it on, only to find it dead. On both occasions it's had to go back, have a new motherboard, then the joy of reinstalling all those Win10 updates, Office 365, McAfee etc etc.....
Now it's happened again

. This time the laptop was running, I didn't have it connected to the AC charger, just plugged in the VGA cable - and it died.
Is it
really possible that a VGA cable or the laptop VGA socket can damage the motherboard - surely the laptop would have some internal protection.
This time it'll be exchanged for a different model - fortunately it's all under warranty! But I've ordered a new HDMI extension cable and a different model of HDMI-to-VGA adapter, just in case....