I am currently using a MacMini (Late 2014) with a BenQ BL2420PT Monitor. I connect them over a Thunderbolt(the old mini-DisplayPort) to DisplayPort cable.

Both Mac and monitor are 6 Months old and I have used them almost every day. But a week ago the monitor didn't show the Apple logo during boot and this morning the monitor just said "no signal detected" for about half an hour.

I already tried booting into safe mode and into recovery mode, but there is nothing showing up.

Mac and monitor are still working because I am able to connect to the Mac via SSH and connecting the monitor to my Windows laptop (VGA to VGA) still works.

Any help would be appreciated


I have the same problem with Late 2012 -- by unknown reason the monitor says 'no cable connected' and cannot turn on. The only solution I found is turn off the monitor via black toggle switch (not a sensor button on front panel) and wait some time.

|improve this answer|||||

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.