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Hp on start up windows starts up but screen is black

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We may need more details:
it may not hurt to check the obvios first: is your monitor data cable connected properly to your tower?... is your power cable connected? is the monitor on??
if screen is on but it's just black the simple possible causes are:
1. your brigtness settings are all the way down... adjust with bottons on your monitor
2. your monitor may be going bad... try to test the monitor on a known good pc
3. your video adapter/controller may be bad... borrow another monitor and test to see if you get a picture.

if after doing 1,2 and 3.. .3 is what you see as the cause, you may have to replace your video adapter.. a. if it's the one that came with computer... get/replace the video card.
if replacing video card is not working for you... try to check memory

Posted on Sep 21, 2008

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There can be several reasons why your laptop screen is going black after logging into Windows. To start with the troubleshooting, you can see if you are able to use Safe Mode to boot into your Windows 8. To know how to boot in Safe Mode, you can refer to the following Microsoft link:
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