No video after changing audio settings

Just got my atv2 and was working fine through HDMI cable. I was in settings and changed audio setting to 16 or some other number and when i turned atv2 back on i get apple logo as normal but when it should start I cant see anything on screen and white led on atv2 flashes once approx every 10 seconds and then atv2 restarts after every 5 minutes or so. Please help have I changed HDMI setting or something?

Surely some one can help. I've tried it on another TV and same thing happens except screen flashes green every now and then.

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T43p-blue screen after changing display settings

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go into the safe mode and change the resolution, or at least reinstall the driver. Press F8 during initial startup of the laptop.
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Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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>There was no password on bios,... how would I reset BIOS to normal?
You can set the BIOS to default ONLY inside the BIOS so you have to access the BIOS pressing F2 or at the beginning of the booting order
But I doubt that this problem is related to the BIOS.
Maybe its just a simple bad luck that this issue happened just exactly after changing something in BIOS.
Try to connect an external monitor and check if you can see something on 2nd display.

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Welcome to Apple Discussions!
Try booting the mini without the display connected, and then, once the system is running, connect the display. This will often force the system to default to a low resolution, and then correctly detect the display when it is connected.
If that doesn't help, with the display connected, boot into safe mode (hold the shift key down when starting up) and once the system is running, change the resolution to 1024x768, and ensure the correct refresh rate is selected. Rebooting normally ought then to give you a good display.
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Did you use the Microsoft Compatibility Center for Windows 8 . before you upgraded to Win 8?
Here please look at this link, the Compatibility center is in there as well as a lot of information you need,
Basically it says
HP provides upgrade instructions and drivers for most computers sold after October 1st , 2011.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03451712&cc=us&dlc=en&lc=en&product=4064844&tmp...
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I am an HP employee
Knowledge is power...Power to the people

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