Get tech news that matters delivered to your inbox. Your second screen is plugged in, but the computer acts like nothing is there. The fix is usually hiding in one of five places: the cable, the ...

Disconnect and reconnect the video cable at both the computer and the monitor. Check for damage, then try a known-working cable if reconnecting it does not help. Keep just one video connection between ...

The Alienware AW3926QW is undoubtedly my favourite monitor of the moment, maybe even ever. It has just one problem that prevented me from giving it an unambiguous buy recommendation. And now it seems ...