The Egg wrote:
Welcome to the TR forums. Going forward, any time you have an issue it's important to list all your system specs straight away, so we don't need to waste time with followup questions. Aside from that, did you actually reach your head around and make double-sure that it's plugged into the videocard? I imagine you would have, but you didn't specifically mention it, so maybe not?
This is exactly what happened to a buddy of mine when he moved - except he has a Xeon I sent him without integrated graphics. He thought he'd broken his machine entirely when moving...turns out he was plugging in both monitors to the motherboard without thinking about it.
I've seen it done too many times to count, even by people who are somewhat knowledgeable. Heck, I may have even done it myself once or twice while quickly switching between work rigs of different configs (and quickly discovered my error, but still).
Port covers (as I've seen for onboard DE-15 VGA in the past) need to start being used again. For instance, any storebought PC which is shipped with a separate videocard is doing the user a disservice by not blocking/plugging the motherboard video outputs. Also, any "gaming" motherboard which is almost certainly going to be used with a discreet card should come with them in the box. It's 10 cents of plastic.