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There are a few possibilities:

1. Loose, unplugged, pinched, or failed video data or power cables.

2. Incorrect BIOS settings.

3. User error. A multiple video card computer may be sending data to the monitor you are not hooked up to.

4. Incorrect brightness settings on your monitor.

5. Failed/failing monitor hardware.

6. Failed/failing video card hardware. This can be part of your motherboard or a removable card.

7. Failed/failing power supply or supplies.

8. Bad operating system driver. However you often will see bios messages before going black on system boot.

9. PC and/or external monitor power supply damaged/malfunctioning.

10. Power supply not sufficient for all attached internal devices.

11. Dirty power. Too many spikes and brownouts.

12. Short in case. Generally caused by an extra screw or other debris in whitebox computers. Sometimes misdiagnosed as a bad case.

13. Malfunctioning or shut off UPS or surge strip, if attached.

14.It has no battery.(laptop)

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9y ago
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14y ago

There are several possibilities.

  • First, this may seem obvious, but make sure the monitor is connected and turned on. Some connections can wiggle loose, so make sure they're actually hooked up properly.
  • If that doesn't fix it, try a different monitor or a different computer to make sure the monitor itself isn't dead.
  • If you've still got nothing, most likely the computer isn't recognizing the monitor. If you have multiple graphics cards, or a graphics card plus a graphics chip on the motherboard, try connecting the monitor to the other video output and see what happens.
  • If you have a laptop, try connecting an external monitor to the alternate video output and see if the graphics are being redirected there.
  • Finally, turn the computer off, take the graphics card out, then replace it making sure it's seated firmly in the slot before turning the computer back on.

If none of this fixes it you will probably need to have a repair technician look at it.
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Wiki User

12y ago

I recently hooked up my HP Pavilion dv6700 Laptop to my LCD Emerson HDTV With a VGA cable. ANd when i hook it up its all normal = ( you can see everything ) but when its about to Show the icons and Desktop it just goes black my tv just says on the right of the screen it says (PC) and its all black. This has never happend but now it did PLEASE HELP?

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Wiki User

11y ago

if the screen is black then this could mean that you either havent plugged the monitor in or you havent turned the monitor on or it could mean that there is a fault with either the monitor or computer that you are plugging the screen into

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12y ago

Either the monitor is turned off, or set to a screen saver.

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12y ago

Off course computer screen can go black when ever it enter standby mode and no graphics is selected for the screen server . Mean while the same thing can happen if the CPU hibernate.

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Q: If your computer turns on but it doesn't show on the screen what can it be?
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