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Turn off notebook. Remove the battery. Press Power button. Notebook should start working. Wait for 15 secs. If the screen still blank press Power button and hold it for approx. 4 seconds until notebook is powered off. Then press power button again. Bingo, problem should be solved.
To reset the bios in a laptop you need to unplug the power supply and remove the battery. Once you do that press and hold the power button for 45 seconds then put the battery back on and plug it in and then try starting it. Everything in the bios will be reset to the factory.
If you are sure the computer is running then connect an external monitor to the laptop. You will have to select the external using your Function keys FN + F7 or F8. If you can now see your machine on the external monitor then you know it's the screen portion of your laptop that is faulty. If this does not work then the sounds you are hereing are probably just the fan and the hard drive spinning. These are not an indication that the computer is working. All in all, I would say that the laptop needs to see a pro.
copy this link in your browser and download file Step 1 Unzip the attached file "crisis.zip" & Copy file name " zg5ia32.fd " and " Flashit.exe " to one USB flash disk i.e USB Pen drive
Step 2 a. Connect the power adapter to laptop b. Insert USB flash disk i.e Pen drive to one USB port of As One Laptop c. Press keys Fn + Esc + power button simultaneously d. Release the power button key when power button LED glows. e. After LED of power button starts flashing release the keys Fn + Esc f. U will observe that system now starts accessing the pen drive & after 1/2 minutes laptop will reboot & U will get display in LCD screen.