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Fix a blank computer screen
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For desktop computers:
Make sure the monitor is plugged in and turned on.
If the monitor is on a power strip, make sure the power strip is on.
Try moving the monitor's plug to another plug on the power strip.
Restart the computer.
For laptop computers:
Press the FN (Function) and F8 keys simultaneously to make sure the laptop is not set to view from an external device like a projector or external monitor.
If you're using a docking station, restart the laptop and ensure it is properly docked.
Restart the computer.
Remove black border around laptop screen
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Try pressing the FN (Function) and F7 keys simultaneously.
Fix a CD-ROM Drive
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If nothing happens when you put a CD in your CD-ROM drive, eject the disc and then reinsert it. If this does not work, restart your computer.
If a CD is stuck in the CD-ROM drive, select Computer from the Start menu, right-click the CD-ROM drive and click Eject.
Fix a computer mouse
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The mouse is not responding.:
Check that the mouse is plugged in at the back of the computer.
Plug the mouse into a different port.
Shutdown the computer, plug in a different mouse, and restart the computer.
The mouse skips/jumps around:
Try cleaning the mouse ball or sensor.
Make sure the mouse pad is clean.
Fix a keyboard
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The keyboard is not typing anything:
Check the keyboard plug at the back of the computer. Unplug the keyboard and plug it back in.
Plug the keyboard into a different port.
Restart the computer.
Shutdown the computer and try a different keyboard.
The keyboard has some faulty keys or is typing weird characters:
Check for any stuck keys. You may need to clean the keyboard.
Check for something laying on part of the keyboard (for example, a corner of a book).
Tap the Shift keys, Ctrl keys, and Alt keys several times (separately).
Restart the computer.
Fix a projector
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If your computer or laptop is connected to an overhead projector, but the projector does not display what's on the computer screen, try the following:
Confirm the projector is turned on.
Confirm the projector and computer or laptop cables are securely plugged into the correct output and inputs.
Confirm the lens cover has been removed from the projector.
On the computer or laptop press the Fn and F8 keys to switch the output to the projector.
Fix sound or speaker issues
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Make sure the speakers are securely plugged in and turned on.
If your computer has two sound cards, try plugging the speakers into the other sound card.
Check the volume control on the computer. Be sure that the speakers have not been muted.