Video output no longer works on MacBook Pro

Yesterday the two DisplayPort outputs on my end 2015 MacBook Pro has stopped working. There has been no hardware or software, change the laptop or monitor (Dell U2715). They worked fine for months and now nothing. When I plug a monitor OS X (El Cap v10.11.5) does even not noticed - not flickering, flashing, etc.. Briefly waking up the monitors, as is they detect an electrical signal, but then don't detect any entry and to go back to sleep.

I've tried a few things...

  1. Restarted several times
  2. Restarted and reset NVRAM EXTRA
  3. Forced to OS X to create a new com.apple.windowserver. [guid] ~/Library/Preferences/ByHost .plist file.
  4. tail-ed a lot of logs in/var/log everything by performing various tasks to display (disconnect, connect, change integrated LCD settings) and nothing seems to indicate a display problem. Actually there no written newspaper at all when connecting physics poster. The ONLY newspaper that is remotely associated display comes system.log and States ' DMProxy [64795]: AMBD Services: _CFXPCCreateXPCObjectFromCFObject failed! But this error repeats frequently and goes back the most old log file of the last week, when the screens were working very well.
  5. Connected to different external displays with the Mac and also received no output and no system log.
  6. The installation worked before was all DisplayPort connections at both ends. I tried to use the mark Apple Thunderbolt-> VGA and adapters HDMI to connect to different views, air-conditioned and with no output.
  7. I have connected a lightning strike-> Gigabit adapter to the same ports, and it has been detected by the operating system.

Edit: The HDMI output also does not work and worked last week. So apparently all output video has failed...

Reset the management system (SCM) controller on your Mac - Apple Support

Tags: Notebooks

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