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Is my motherboard dead? What does this mean...

When I turn on my computer, it comes up with a black screen and on the screen there's a flashing white symbol in the upper left hand corner like this "_". What does this mean? The PC or whatever also comes on but the keyboard and the mouse don't function.

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My kid's machine does that when...

The scanner is plugged in. I unplugged all USB things and it boots.

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We don't have a scanner...just a keyboard, mouse, and a router.

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Since those are on USB

For a test, unplug those. And eject any CDs.

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still need help

someone please help!

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Let's say you did this test.

And it still does it. At this point this machine may need repairs. New drives, etc.

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