Cannot open my laptop... Did everything from removing the battery, cleaning the fan but still screen says non system disk or disk error replace n strike any key when ready.... Help pls

<b><u>For Hp Laptop</u></b><br /><br />There are many reasons that a computer does not startup or boot into the Windows operating system.<br /><br /><b><u>Resolving Start Up and No Boot Problems Checklist</u></b><br /><b></b> <br /><b>Perform a Hard Reset</b><br />1. Disconnect all peripheral devices and remove all USB devices and media cards.<br />2. Disconnect the AC power adapter, remove the battery, and then press and hold the power button for at least 15 seconds.<br />3. Reconnect the AC power adapter (do not connect the battery), press the Power button and look for the LEDs to blink or glow, and listen for the sound of a disk drive and fan turning.<br />If computer does not start normally, identify the specific problem symptom listed below and take the recommended actions.<br /><br /><b>Symptom: LED lights do not glow, display is black, computer does not start<br /></b>If LEDs do not glow when power button is pressed, there is no power available to the notebook. Check AC adapter wiring and power connection to the notebook. Connect a different AC power adapter and remove battery. Connect a different battery and disconnect AC power adapter. If there is no battery or AC power at the notebook, contact HP for technical assistance.<br /><br /><b>Symptom: LEDs glow, but computer fails to startup or boot, and displays a black screen</b><br />Usually occurs if a component is installed incorrectly, or there is a device conflict or failure. Connect an external monitor to check display Remove all CD/DVDs, SD cards, USB devices, peripherals and do hard reset If memory or hard drive components were replaced, reinstall original components Remove memory modules and replace one-at-a-time If possible, boot to BIOS mode (f10) and run Memory Test and Hard Drive Test If all other methods fail, use recovery disk to recover the computer to original condition.<br /><br /><b>Symptom: Computer displays a blue screen or continually re-starts</b><br />Trying to restart the PC after an error message can usually bypass the error and the PC can run in Safe mode to install an update or patch. <br />Boot to BIOS Diagnostics (f10) and run memory and hard drive diagnostic tests Boot to Windows Advanced boot options (f8) and:<br />o Select Disable automatic restart on system failure to view error message<br />o Run Repair Your Computer<br />o Run Last Known Good Configuration (Advanced)<br />o Select Boot into Safe Mode and then Run a Microsoft system restore<br />o Select Boot into Safe Mode and then Uninstall recently installed programs<br />o Select Boot into Safe Mode and then run Windows Update<br /><br /><b>Symptom: Computer displays the Windows logo screen and stops responding</b><br />Boot to Windows Advanced boot options (f8) and select Disable auto-restart to view error message<br />Boot to BIOS mode (f10) and Restore the BIOS defaults (f9) Boot to BIOS mode (f10) and run Hard Drive Test Boot to Windows Advanced boot options (f8) and select Last Known Good Configuration (Advanced) Boot to Windows Advanced boot options (f8) and select Boot into Safe Mode and then Uninstall recently installed programs<br /><br /><b>Troubleshooting general black screen errors on an EFI-based computer</b><br />The Extensible Firmware Interface (EFI) is available on select HP Notebook PCs manufactured in late 2008 and beyond.<br />To access the Startup Menu and the troubleshooting options on an EFI-based computer, press the power button and immediatly press the ESC key. If computer does not display a EFI Startup Menu, it may a non-EFI computer.<br />The EFI environment allows you to select from the following options:<br />Press f1 for System Information .<br />Press f2 to perform System Diagnostics .<br />Press f1 for System Information System Information.<br />Press f2 to perform the Start-up Test .<br />Press f3 to perform the Run-in Test .<br />Press f4 to perform the Hard Disk Test .<br />Press f11 to view the Error Log .<br />Press f9 for Boot Device Options .<br />Press f10 for Bios Setup .<br />Press f11 to perform a System Recovery .<br /><br /><b>Troubleshooting general black screen errors on non-EFI based computers<br /></b>The Extensible Firmware Interface (EFI) was not available on computer manufactured in 2008 or earlier.<br />When you try to start your computer, it may appear to stop responding with an empty, black screen before reaching a blue screen or the Windows logo. If there is no specific error message provided, there are several things you can do to troubleshoot a black screen. <br />Remove a non-system disk from the computer <br />To remove all non-system disks and reboot the computer, follow the steps below:<br />Disconnect any eSata, USB, or 1394 (Firewire) devices that are attached to the computer.<br />Remove any CD / DVD discs or memory cards from the drives if present.<br />Press and hold the Power button for 30 seconds to turn off the computer. Then, press and release the Power button to turn on the computer. <br /><br /><u> NOTE: During startup, a computer checks several devices for an operating system in a pre-determined order. You can change the order that the computer uses in the system BIOS. </u><br /><b>After removing any non-system disk:<br /></b>If the computer starts up normally to the Windows desktop, no further action is needed.<br />If the computer still stops at the black screen continue by restoring the BIOS default settings.<br /><br />for re-installation bios process, waiting for next tips. <br /><span>Thank you</span> <span>for taking</span> <span>the time</span> <span>to</span> <span>read. H</span>opefully these tips beneficial to you to solve your hp laptop.<br /><br />Regards<br />Multilinkent