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what you can do is-hold down the power button until all the lights go off.once it is done turn on the pc and start tapping the f8 key repeatedly.it will take you to a screen which says advanced boot options.here using the up and down arrow key select the option last known good configuration and hit enter.if everything goes fine your system should boot without a problem.
remove battery, press and hold power button for 5 seconds, and then put battery back in and turn on. This usually works, if it doesn't you may need to dismantle it and check for faulty memory cards.
If the laptop appears to boot up and you can't see an image on the screen, you need to determine if the screen is faulty or the video card.
Connect an external monitor to the laptop's external video port, power up the monitor first and then boot up the laprop. If you get a normal video image on the monitor then the video card is OK and the fault is with the LCD screen.
If you don't get an image or POST information, then the LCD screen could be faulty or the laptop didn't boot up.
Please get back to me with the results of your tests and any error messages etc. so I can advise further.
when the windows are going in the booting and it is colored black,
the problem can be wrong with the windows or set the mode dual setting LCD 1st
graphic assign it, try to use external LCD Monitor or connect to back of
laptop
Press the start button then hold down F8 to go to a black screen with writing. Scroll to boot windows to last known good boot (maybe not exact words, but do last known good start) Click that option and windows should boot to the last good start of your computer.
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