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Windows 7: Invalid Format when laptop connected to HDMI TV

18 Feb 2014   #1

Windows 7 Pro x64
Invalid Format when laptop connected to HDMI TV

I messed up display settings for when I attach a TV via HDMI to my laptop. I set the system to display only on the TV (OK, not a totally stupid idea) and then picked a resolution the TV doesn't support (that was TOTALLY stupid!) When I disconnect the TV, laptop display works as normal. As soon as I connect the TV, laptop screen blanks and TV goes to Invalid Format. I have tried to change display settings through the control panel with the TV disconnected, but as soon as I plug in the TV, it goes back to the bad resolution on the TV and no laptop display.

Is this stored in the registry somewhere? I want to reset the flag telling the system to display only on 2nd display.

Please help

My System SpecsSystem Spec

19 Feb 2014   #2

Microsoft Community Contributor Award Recipient


Hi OldWraith, welcome to the Seven Forums.

This should work:
  • Connect the TV, don't mind the Invalid Format warning
  • Press WIN + P to open Display Switch dialog. You don't see it as it's on the non-working TV display but trust me, it's there:

    (Screenshot from our tutorial Display - Change Main Display)
  • Press Right Arrow > Press Enter to change from Display 2 only to Display 1 only
  • Now you should have the desktop on laptop's display, you can change your display settings as you wish
My System SpecsSystem Spec

 Invalid Format when laptop connected to HDMI TV

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