Changed resolution Now black screen after reboot

March 11, 2012 at 15:40:24
Specs: Windows XP
In order to install the new yahoo to my compaq notebook I had to change the resolution. After switching it said I needed to reboot so I did. Now when I start the computer I only get a black screen. What do I do?

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#1
March 11, 2012 at 16:33:25
Reboot, immediately tap the F8 key, then choose VGA Mode from the advanced menu. The screen resolution should be set to the native resolution for your screen. Just set it & forget it. Once it's set, it should NOT be changed. Can't help you with the correct setting though because you didn't bother to list the model & model number of your laptop.

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#2
March 11, 2012 at 19:37:05
"In order to install the new yahoo to my compaq notebook I had to change the resolution. After switching it said I needed to reboot so I did. Now when I start the computer I only get a black screen"

You should always have video while booting BEFORE Windows starts to load !
If you have no video while booting BEFORE Windows loads, something else is wrong !

Try connecting an external monitor.

Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.

See response 1:
http://www.computing.net/answers/ha...

DO NOT plug in or unplug a monitor's video cable into / from a video port while the computer is running. Doing so can damage the monitor's circuits and/or the video adapter's circuits.

Some laptops will display on an external monitor without you having to do anything.

If you get no video on an external monitor, some laptops have a key combo that you must press to toggle the display to external video only / built in display video only / sometimes both - see the Owner's or User's manual for the model.
......

If you had chosen the wrong resolution in Windows' Display Properties such that it cannot be displayed, it would NOT have "stuck".

When you change the resolution in XP's Display Properties, there is a small window that pops up over the desktop screen that has a 15 second countdown timer.

"Your desktop has been reconfigured. Do you want to keep these settings ?
Yes No
Reverting in xx seconds."

If you choose a resolution that can't be displayed by your monitor, you see blackness, the resolution reverts to it's former setting after 15 seconds, you have video.

If you choose a resolution that CAN be displayed by your monitor, you still have a display, you see the small window, and
- if you click on Yes within 15 seconds, the changed resolution is accepted
- if you click on NO, or if you don't respond within 15 seconds, the resolution reverts to what it was before.
...

You CAN have the situation where you have video while booting but NO video after Windows starts to load
- the first time Windows is Restarted after you have installed specific video drivers
for your adapter in Windows, and thereafter. That's caused by the specific video drivers not recognizing your monitor properly, and that's easy to fix.
For 2000 or XP...
See response 9 here:
http://www.computing.net/answers/ha...

starting at....
Boot into Enable VGA mode.

Note - that's missing this...

Remove any bootable CDs or DVDs you have in drives.
Press F8 repeatedly while booting, don't hold down the key, starting very early in the boot.
When the Windows "Advanced..." menu appears, choose Enable VGA mode.

- or - if you have changed which monitor you're using with a desktop computer . E.g. if you changed from a CRT to an LCD monitor, a CRT monitor can be set to a vertical refresh rate in Windows that an LCD monitor cannot display.


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