Blank laptop screen after attempt to connect to TV HDMI

I tried to connect my Toshiba Windows 8 laptop to my Sanyo HDMI TV. No matter which Input I chose I had no signal. Also, after that, I had no image on my laptop I've even tried removing the battery from the laptop, but when I reboot , I can see the screen long enough to enter my computer password, but then, the screen goes blank, even though the HDMI cable is no longer connected. How can I I use my Keyboard options with Windows 8 to bring the display back to my laptop?
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More about blank laptop screen attempt connect hdmi
  1. There should be a key on your keyboard to switch between laptop and external display. You will have to read the instruction manuel to figure it out, since I don't know the exact model of your laptop.

    -Bloc97
  2. The shortcut key to toggle display screens for Windows 7 is "Start key + P", I assume it's the same for Windows 8.
  3. pauls3743 said:
    The shortcut key to toggle display screens for Windows 7 is "Start key + P", I assume it's the same for Windows 8.

    But the problem is that he wouldn't see what he is selecting... On the keyboard, there is a key to enable/disable external displays...
    -Bloc97
  4. Both displays should not go black. May be different for desktop, but 1 display should stay on, till screens configured under "Screen Resolution".
  5. Astralv said:
    Both displays should not go black. May be different for desktop, but 1 display should stay on, till screens configured under "Screen Resolution".

    There was cases of this before, the settings being messed up and the laptop not displaying on its own screen even after reboot. It is rare, but may happen sometimes, especially when he can access the user select menu.

    -Bloc97
  6. Astralv said:
    Both displays should not go black. May be different for desktop, but 1 display should stay on, till screens configured under "Screen Resolution".

    There was cases of this before, the settings being messed up and the laptop not displaying on its own screen even after reboot. It is rare, but may happen sometimes, especially when he can access the user select menu.

    -Bloc97
  7. Any other ideas? He says the toggle doesn't work and that he never used it initially when he connected the HDMI cable. He said it went out by itself when he connect the cable, but didn't come back when he disconnected it.
  8. AimeeM said:
    Any other ideas? He says the toggle doesn't work and that he never used it initially when he connected the HDMI cable. He said it went out by itself when he connect the cable, but didn't come back when he disconnected it.

    What happens when you go in safe mode? If you can see your screen, re-install the display drivers in safe mode. (or at least uninstall it)

    -Bloc97
  9. Check HDMI input on TV and make sure it is on a right port. Restart the laptop without HDMI. The signal should go somewhere.
  10. Try the RECOVERY method discussed here:
    http://www.tomshardware.com/forum/3922-73-windows-black-screen-pointer

    It sounds like a GLITCH where the NVidia drivers or Windows "thinks" you have it setup so your HDMI screen is working but the laptop screen is disabled.

    Other:
    1) Try a different HDMI cable
    2) Try a different HDTV with HDMI
    3) Press the F-KEY combo that TOGGLES which screen or screens is displayed (WITH and WITHOUT your laptop attached to an HDTV)
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