Q: My thunderbolt display will not come on. When I reboot the white start up screen comes on and the black line starts coming across ... My thunderbolt display will not come on. When I reboot the white start up screen comes on and the black line starts coming across and then about halfway the screen goes black. Although I have all the screen is the mouse pointer.help please. Thank you more
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Helpful answers
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Feb 4, 2015 6:32 AM in response to Emma8195by jeffd55,Hi Emma,
Thank you for using Apple Support Communities.
I understand that your Thunderbolt display is just showing a black screen when you boot your computer. The following article should be of help in troubleshooting your display.
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Cheers,
Jeff D.
