1.    25 Jan 2017 #1
    Join Date : Jan 2017
    Posts : 2
    Windows 10 64 bit

    HDMI output appears inactive

    I have a new HP all-in-one "desktop", added second monitor about 3 weeks ago, worked for about a week and then second monitor went blank. Called HP, they walked me thru a "fix" which worked. A week later, same thing. I did their fix and it worked a second time. Happened again this week, fix no longer works. Monitor is good, cables are good, I'm thinking the HDMI output is bad but don't know how to check. Should it show up in device manager as a separate entry under display output? or is it just part of the display output and not listed separately. I don't have another HDMI device to check the output other than the second monitor.

    I have used second monitors for 20 years and this is the first time anything like this has happened. HP tech support has NOT been helpful, even tho the PC is under warranty.
      My ComputerSystem Spec
  2.    25 Jan 2017 #2
    Join Date : Mar 2015
    Posts : 1,174
    Windows 10 Pro x64

    It sounds like the port has gone bad. You've done the troubleshooting, so I would start asking HP for a replacement.
      My ComputerSystem Spec
  3.    25 Jan 2017 #3
    Join Date : Nov 2016
    Posts : 441
    Windows 10

    Yes, it should show up as a second monitor in Device Manager > Monitors.
    When the second one is disconnected it becomes hidden but you can show that in Device Manager.
    What is HPs fix ?
      My ComputerSystem Spec
  4.    25 Jan 2017 #4
    Join Date : Jan 2017
    Posts : 2
    Windows 10 64 bit
    Thread Starter

    Their fix was to turn every off and disconnect, then hold power button for 15 seconds, then restart and reset the BIOS to factory defaults. Worked the first time when I was chatting with them, worked the second time on my own. Didn't work the third time. Device manager for display adapter shows the intel display adapter, device manager for monitors only shows generic pnp display which is the main display on the all-in-one.
      My ComputerSystem Spec


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