molly.08
Level 1 (0 points)

Q: my macbook pro no longer connects to my tv through HDMI my computer screen flashes blue but my tv does nothing! could someone please help!!

HI i was just wondering if anyone could help me!!

 

i have a macbook pro and i have connected it many times to my toshiba tv through my HDMI cable, and for some reason now when i plug it into my laptop the screen flashes blue on my laptop but nothing happens to the tv it just says no signal and i dont know what to do!!

if anyone could help that would be fab!!

pretty pretty please!!

MacBook Pro

Posted on Sep 23, 2014 1:18 PM

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molly.08

Q: my macbook pro no longer connects to my tv through HDMI my computer screen flashes blue but my tv does nothing! could someone plea ... more

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  • by alex_h1,

    alex_h1 alex_h1 Sep 25, 2014 2:27 PM in response to molly.08
    Community Specialists
    Sep 25, 2014 2:27 PM in response to molly.08

    Hello ,

    Thanks for using Apple Support Communities.

     

    Please follow the steps below to troubleshoot having no display on the external display.

     

    No video or no signal, image distortion, "snow," or flickering

    Check connections

    When using an external display be sure to check the following:

    1. If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
    2. Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
    3. Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
    4. Try unplugging the video adapter or cable and then plug it back in.
    5. If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
      • Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
    6. If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).

    Reset the system

    You can reset the Mac's parameter RAM and SMC.

    Reset the resolution

    Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:

    • Start up in Safe Mode.
    • From the Apple () menu, choose System Preferences.
    • Choose Displays from the View menu to open the preferences pane.
    • Select any resolution and refresh rate that your display supports.
    • Restart your computer.

     

    Apple computers: Troubleshooting issues with video on internal or external displays

     

    Take care,

    Alex H.