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HP Notebook PCs - Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot
There are many reasons that a computer does not startup or boot into the Windows operating system. If your computer will not start or boot, you will see or hear symptoms to indicate the general area of the problem. If you are not sure what the problem is, see Overview of How to Troubleshoot Problems When a Computer Does Not Start Up or Boot Properly .
Startup Symptom: LEDs glow, but computer fails to startup or boot, and displays a black screen
Use this document if the LEDs glow to indicate that power is available, the sound of a fan or spinning hard drive can be heard, but no colors, images, or text are displayed on the LCD display.
The cause of this problem may be the failure of a hardware component, or an error in the instruction being sent from the BIOS to a hardware component.
DO THIS FIRST - Perform a hard reset
If a PC suddenly fails to boot properly, you should perform a hard reset as the first procedure.
Connect an external monitor
If there is a problem with the LCD display's back light or a corrupted graphics driver, the display may appear blank but the notebook may be displaying information. Attach an external monitor to test the display.
If the image displays on the external monitor, there may be a graphics driver conflict. To resolve this, turn on the computer and press f8 key, then select Enable low-resolution video . If the image displays on the LCD display in low resolution, you can download and install the latest drivers for your specific graphics driver.
If there is an image on the external monitor but the notebook display remains black, contact HP for technical assistance.
Disconnect all peripherals and repeat the hard reset
Even though users are instructed to disconnect all peripheral devices from the notebook when doing a hard reset , some devices are often overlooked.
Double-check that all devices are disconnected including: external keyboard and mouse (wired or wireless), USB connected external drives and devices, thumb drives and flash drives, network storage devices, PC card, SD memory cards, express card, eSata connections, firewire or similar devices, printer, scanner, camera, port replicator, or docking station, any CD/DVD from the optical disc drive, and any media from the multi-card reader.
Test for memory module problems
Some HP Notebook PCs come with two sticks of memory and have two memory slots. If you experience a black screen error, the problem could be with one of the sticks of memory or with one of the memory slots. To determine what is causing the failure, try to isolate the problem by Performing a memory self test , Checking for loose memory modules , Testing the memory modules , and Testing the memory slots .
The memory module compartment on most notebooks is located on the bottom of the case. The exact position varies by model. However, on some models, the memory compartment is under the keyboard. See your User Guide for the exact location of memory modules on your notebook.
Perform memory self test
If the computer can access part of the memory, it may be possible to access the BIOS Setup Utility display and perform a memory self test to identify other memory issues. If the computer cannot boot to the BIOS Utility, try removing and reseating the memory and the hard drive, and then repeat the following steps to perform the memory self test.
If the test fails, one or more of the memory modules may not be seated properly. Check for and reseat loose memory modules.
Check for loose memory modules
If a memory module is loose or is not making good contact with the memory slots, the computer does not recognize all of the memory. Reseating the memory module may resolve memory failure errors. To reseat the memory module, take the memory module out of the memory slot and then put it back into the slot to get a better connection so that the computer can recognize the memory.
The memory module compartment on most notebooks is located on the bottom of the case, however, on some models, the memory compartment is under the keyboard. See your User Guide for the exact location of memory modules on your notebook.
Use the following steps to remove and reseat the memory modules:
if the computer fails to boot to the Windows desktop after the memory is reseated and the battery is installed, contact HP for support.
Test the memory modules
Only one memory module is required for the computer to operate. If two memory modules are installed, each memory module should be tested in the computer independently of the other.
To test the memory modules, follow the steps below:
Test the memory slots
If a memory module does not work in both the slots, to test the individual memory slots, follow the steps below:
After the memory is reseated, replace the memory compartment cover, connect the AC adapter and turn on the notebook.
If you do not feel comfortable reseating the memory yourself, take the computer to a computer retailer and ask them to reseat it for you.
Test the hard drive
Many computer problems are related to soft failures (or degraded performance) on the hard drive. The HP Hard Drive Self Test will repair soft errors on the hard drive, but it will not report the errors. After the test is complete, restart the computer to see if test repaired the problem you may been experiencing.
Use the steps below to test the hard drive in a computer using the HP Hard Drive Self Test.
The Hard Drive Self Test performs a Quick Test followed by a Comprehensive Test . During each test, the window displays a status bar and an estimated time to completion. See HP Notebook PCs - Testing a Hard Disk using the Built in Self Test for additional information.
If the notebook does not start and a black screen still appears after following the steps in this document, contact an HP Service and Support technician for further assistance. Click the Contact HP link in the upper left column on this page, or go to the hp.com home page and select Contact HP / Customer Service for information about the support options in your location.
What to do when the computer starts into Windows normally
After you have completed the troubleshooting process and your computer has booted normally into the Windows operating system, you should:
For detailed information on this topic, see HP Notebook PCs - Update Your Computer After Troubleshooting a Problem