MBA, Elgato thunderbolt dock and ASUS monitor

[PedroW]

Hi I have a 2014 MBA connected by thunderbolt cable to an Elgato Thunderbolt dock with an external hard drive, cd drive connected via usb3 and and an ASUS PB287Q monitor connected via thunderhead. I run the MBA closed in clamshell mode.

I have a weird issue that is intermittent: every so often the monitor will go blank and show the "display port has no input" if I open the clamshell at this point the MBA is still showing the desktop. To fix usually I need to power the monitor down and then turn the monitor on again. Occasionally I can get it to redisplay by turning monitor off at the bottom and on again.

Not sure if it is a monitor issue, an Elgato issue, a MBA issue or a cable issue.

Anyone had similar or got any ideas? Thanks

 

[ColdCase]

Is the display going blank when the laptop sleeps or when the screen saver kicks in? Which OS are you using?

 

[PedroW]

El Capitan and everything up to date - sometime when I try and bring it out of sleep. But often whilst I am using it live no screensaver.

Since I powered the screen down fully this morning and left it and replugged it in it seems fine. But that is normal for the pattern.

 

[ColdCase]

Thats something I'm not familiar with, but if the behavior started after an update, that may be the culprit. I would suspect more along the lines of a cable/connector issue, or even a hardware issue in the dock or display... but thats just a general guess, and of no help. Hopefully someone with more direct knowledge will jump in here soon...... ....when was the last time you restarted your Mac?

 

[gman36]

I had some issues with my thunderbolt LG display after an update. I blame el capitan.