Hp 15 Laptop Black Screen After Login

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HP Notebook PCs - Troubleshooting Black Screen Displays with No Error Messages During Startup or Kick

Startup Symptom: LEDs glow, but computer fails to startup or boot, and displays a black screen

Utilise this document if the LEDs glow to indicate that power is available and the sound of a fan or spinning hard drive can exist heard, merely no colors, images, or text are displayed on the LCD brandish.

Do non utilize this document if there are no sounds from the estimator when the power is turned on. You should cheque for a unlike trouble; such as a loose RAM memory chip or disconnected hard drive.

The cause of this trouble may be the failure of a hardware component, or an error in the instruction beingness sent from the BIOS to a hardware component.

Before yous brainstorm troubleshooting your computer

Before you brainstorm troubleshooting your figurer, perform the following steps:

Pace ane: Perform a hard reset

If your computer suddenly fails to boot properly, yous should perform a hard reset.

Disconnect all peripheral devices and remove all USB devices and media cards. You lot want to examination the computer not the accessories!
Disconnect the Air conditioning power adapter, remove the bombardment, and then printing and hold the power button for at to the lowest degree 15 seconds.
Reconnect the AC ability adapter (but do not connect the battery), Press the Power button, Look for glowing LEDs well-nigh caps lock and num lock keys, and Listen for sounds of a deejay drive and fan turning.

If the display remains blank (blackness screen or white screen) later on doing a hard reset, temporarily connect an external monitor to test the notebook's brandish. If an paradigm displays on the external monitor, continue to perform the tests, install drivers, and brand adjustments as described in the next section.

Stride two: Connect an external monitor to test the display

The notebook's screen display may remain black when there is a corrupted graphics driver, or a problem with the LCD display's dorsum calorie-free. You lot tin test the display by attaching an external monitor and restarting the computer. Testing with an external display is helpful if the notebook display is black only you tin can hear sounds; such equally fans, spinning drives, or beep tones which indicate that the calculator is operating. If you can hear sounds of functioning but no image is visible on either display, contact an authorized repair center.

If there are no sounds from the computer when the ability is turned on, check for a unlike problem; such every bit a loose RAM memory chip or asunder hard drive.
If you are having trouble viewing the external monitor, click f4 (or the key with this symbol ) to switch the screen image among brandish devices connected to the organisation. For example, if a monitor is connected to the figurer, pressing this key alternates the screen image from computer display to monitor display to simultaneous display on both the computer and the monitor.
If an image displays on the external monitor, there may be a graphics driver conflict with the notebook'southward LCD display. With the external monitor connected, download and install the latest drivers for your specific computer and graphic chip set.
If you do not have an external monitor, it may be possible to see an image by switching the LCD display to a low resolution mode. To modify the resolution, turn on the computer, and press the f8 key. If the graphic display is working at the BIOS level, a text screen displays and you can select the Enable low-resolution video option. If the graphics display is non working at the BIOS level, contact an authorized repair center.

Every bit a terminal action, if there is an epitome on the external monitor and y'all accept installed the latest BIOS, updated CPU fries set, and updated graphics drivers but the notebook display remains blackness, the LCD may be defective. Information technology may be necessary to contact HP for technical assist or send the notebook for service to supercede the display.

Footstep three: Disconnect all peripherals and repeat the hard reset

Even when instructed to disconnect all peripheral devices from the notebook before doing a difficult reset, some devices are oft disregarded.

Double-bank check that all devices are disconnected including: external keyboard and mouse (wired or wireless), USB connected external drives and devices, thumb drives and wink drives, network storage devices, PC card, SD retention cards, express card, eSata connections, firewire or similar devices, printer, scanner, camera, port replicator, or docking station, whatsoever CD/DVD from the optical disc bulldoze, and any media from the multi-carte reader.

Proceed to the Examination for memory module problems section.

Examination for retentivity module problems

When you try to plow on a computer, one of the first hardware tests performed is the retentiveness bank check. If the start upwardly test cannot access the retentiveness chips, the testing stops and no additional actions can be taken. In other words, when yous press the ability push the LEDs may glow for a moment and a fan may first to spin, but then all action stops.

This problem must be resolved before yous tin can boot into the BIOS or Windows and perform any other tests.

Some HP Notebook PCs come with 2 sticks of memory and accept two memory slots. If you experience a black screen fault, the problem could be with 1 of the sticks of memory or with one of the retentivity slots, or i of the sticks may non be seated properly in the slot.

The retention module compartment on nigh notebooks is located on the lesser of the instance. The verbal position varies by model. Still, on some models, the memory compartment is under the keyboard. See your User Guide for the exact location of retentivity modules on your notebook.

Examination for retentiveness problems using the memory self exam

If the computer can access function of the retentivity, it may exist possible to access the BIOS Setup Utility display and perform a retentiveness self test to identify other memory problems. If the computer cannot boot to the BIOS Utility, try removing and reseating the memory and the difficult drive, and and then repeat the post-obit steps to perform the memory self test.

Plug the AC adapter into the calculator.
Plough off the figurer and wait 5 seconds.
Press the Power button to start the reckoner and repeatedly press the f10 key to enter the BIOS Setup menu.
In the BIOS Setup Utility, use the Right Arrow or Left Pointer keys to navigate through the carte du jour choice to locate the Diagnostics.
Employ the Up Arrow or Down Arrow keys to select Memory Test.
Printing Enter, and then Yeah to perform memory test.
Later test completes, press f10 to Salve and Exit, then printing Enter to Go out Saving Changes.

If the test fails, i or more of the retentiveness modules may not be seated properly. Check for and reseat loose memory modules.

Check for loose memory modules

Normally, a computer will not display an image if a memory module is loose. However, in some cases, if a memory module is loose or is non making good contact with the memory slots, the estimator may responds only does not recognize all of the memory. Reseating the retentivity module may resolve retentiveness failure errors. To reseat the retentivity module, take the memory module out of the memory slot and then put it dorsum into the slot to become a better connexion so that the computer can recognize the memory.

The retention module compartment on nigh notebooks is located on the bottom of the example, nonetheless, on some models, the retentivity compartment is under the keyboard. Run across your User Guide for the verbal location of retention modules on your notebook.

Use the following steps to remove and reseat the retention modules:

Step one - Remove the electrical ability
To remove all power from the estimator and preclude accidental damage to the electronic components, do the post-obit:
1. Turn off the computer by pressing and holding down the Ability button for almost 30 seconds.
2. Unplug the AC adaptor from the notebook.
3. Slide and hold the battery release latch to the unlock position.
4. Apply your finger to lift the battery upward and out.
Step 2 - Remove the memory module
1. Remove the memory module cover on the bottom of the notebook.
2. Remove the retention modules from the retentiveness slots.
  caution:
  To prevent harm to the retention module, grasp the memory module by the side edges. Practice not touch the metal contacts.
3. Reseat the memory module by property module at a 45-degree bending, and pressing information technology firmly into the retentivity slot until information technology is seated.
4. After reseating the memory module, replace the cover over the retention compartment before restarting the computer.
  
  Figure : Replacing the compartment cover
  
  Align the embrace tabs
  
  Tighten the memory compartment cover screws
Footstep iii - Replace the electrical ability
When troubleshooting problems, use simply the AC power to perform the tests. After the problem is resolved, you lot can plough off the reckoner and insert the battery into the notebook.
1. Plus the connexion from the AC adapter into the notebook, and so connect the AC adapter to a working power supply.
2. Perform any tests to verify the computer can startup and run in the Windows operating organisation.
3. With the reckoner turned off, push the battery into the base enclosure until the retentivity clips click into position.

If the reckoner fails to boot to the Windows desktop after the memory is reseated and the battery is installed, contact HP for back up.

Test two memory modules

Just one memory module is required for the computer to operate. If two memory modules are installed, each memory module should be tested in the figurer independently of the other.

To test the memory modules, follow the steps below:

With the AC adapter and battery disconnected, remove all the memory modules, and so insert one retentivity module in the first slot.
Connect the AC adapter and turn on the notebook. If the computer starts up unremarkably, the retention modules function correctly.
Remove the AC adapter and turn off the notebook. Then repeat the same process for the second module.
If the estimator starts normally, then both retentiveness modules are adept.

Later the retention is reseated, connect the Ac adapter and turn on the notebook.

If the computer starts upwards normally to the Windows desktop, no further action is needed.
However, if the estimator still stops at the black screen continue by testing the retention slots.

Test two retentivity slots

If a retention module does not piece of work in both the slots, to test the individual memory slots, follow the steps below:

After testing the retentivity modules as described in a higher place, insert one module in the 2d slot, connect the Air-conditioning adapter and turn on the notebook.

If the computer starts up usually, the retentivity slot functions correctly.
Remove the Air-conditioning adapter and turn off the notebook. Then repeat the same procedure for the 2d slot.

If the computer starts up usually, you have verified that both memory modules and memory slots role correctly.

After the memory is reseated, supercede the retentivity compartment comprehend, connect the Ac adapter and turn on the notebook.

If you do not feel comfortable reseating the memory yourself, take the reckoner to a figurer retailer and enquire them to reseat it for you.

Examination for memory problems using HP PC Hardware Diagnostics

The Retention Tests include a Fast Test, Quick Test, and an Extensive Test. If you recall there is a problem with the retentiveness, offset endeavor the Fast Test (3 to 5 minutes). If the Fast Test does non find a problem, run the Quick Test (about 10 minutes). If the Quick Test does non detect a trouble, run the All-encompassing Test (about 45 minutes) which also has a Loop Until Error option.

Follow these steps to run the Fast Test:

Agree the power button for at least five seconds to turn off the computer.
Plow on the computer and immediately press Esc repeatedly, almost once every 2nd. When the carte appears, press the F2 key.
On the main menu, click Component Tests.

Figure : Selecting Component Tests from the main carte
The Component Tests menu displays. On the Component Tests card, click Memory.

Your Component Tests menu might be dissimilar, depending on the components installed on your figurer.

Figure : Selecting Retentivity from the Component Tests menu
In the Retentiveness Test menu, click Fast Exam.

Figure : Running the Fast Test
Click Run in one case. The Fast Exam begins.
When the Fast Exam is consummate, the results are displayed on the screen.

If the retention passes the Fast Test merely there is nonetheless a problem with the computer memory, run the Quick Examination.

If the memory passes the Quick Exam just in that location is still a problem with the calculator retention, run the Extensive Test. This test can accept 45 minutes or longer.

If the retentivity fails one of the tests, write down the failure ID (24-digit code) and so you have it available when you contact HP Client Support. The data is also available in Test Logs on the main menu.

Exam for difficult bulldoze problems

Test for difficult drive problems using the hard drive self test

When you try to turn on a computer, i of the preliminary hardware tests performed is the difficult bulldoze connexion check. If the start upward test cannot access the hard drive, the testing stops and no additional deportment can exist taken. In other words, when you press the power button the LEDs may glow for a moment and a fan may get-go to spin, but and so all activeness stops. Removing and reseating the difficult drive can restore the connection and allow you to continue the start upwards testing and perform other difficult drive tests.

note:
This problem must be resolved before you tin can boot into the BIOS or Windows and perform any other tests.

Many computer problems are related to soft failures (or degraded performance) on the difficult drive. The HP Hard Drive Self Test will repair soft errors on the hard drive, but it will non report the errors. After the exam is complete, restart the computer to see if examination repaired the problem y'all may been experiencing.

Utilise the steps beneath to test the hard drive in a computer using the HP Difficult Drive Self Test.

Plug the AC Adapter into the reckoner.
Turn off the computer and await 5 seconds.
Press the Ability button to start the computer and repeatedly printing the f10 primal to enter the BIOS Setup Card.
Utilise the Left Arrow or Right Arrow keys to navigate through the card choice to locate the Main Difficult Drive Self Examination selection. Depending on your BIOS, this may be located below either Diagnostics or Tools.
Select Primary Hard Drive Self Test, and printing the Enter key to offset the test.

notation:
The exact wording for your particular BIOS may exist slightly unlike.

The Hard Drive Self Test performs a Quick Exam followed by a Comprehensive Test. During each exam, the window displays a status bar and an estimated time to completion. Come across Testing a Hard Disk using the Built in Self Test for boosted information.

If any examination fails, contact HP service and back up for instructions on how to society a replacement hard bulldoze.
If all of the tests pass, the hard drive is not damaged. As a rule, HP will not replace a hard drive nether warranty that does not fail the HP Hard Drive Self Test.

Test for hard drive issues using HP PC Hardware Diagnostics

There are six hard drive tests. If you lot think at that place is a problem with the difficult drive, beginning try the Quick Test (2 to three minutes). If the Quick Exam does not observe a problem, run the Extensive Test (2 hours or more than) which also has a Loop Until Error option.

Follow these steps to run the Hard Bulldoze Quick Exam:

Agree the power button for at least v seconds to turn off the computer.
Turn on the calculator and immediately printing Esc repeatedly, about once every second. When the carte appears, press the F2 key.
On the main card, click Component Tests.

Effigy : Selecting Component Tests from the master carte
In the Component Tests carte, click Difficult Drive,

Effigy : Sample list of Component Tests
In the Difficult Drive Tests carte du jour, click Quick Examination.

Figure : Selecting the Hard Drive Quick Test
Click Run In one case.

Figure : Running the Hard Drive Quick Test
The Hard Drive Quick Test begins. If the computer has more than one hard drive, select the drive y'all want to test. To examination all the hard drives, select Test All Hard Drives.

When the test is complete, the results are displayed on the screen. Exam results are likewise bachelor in the Test Logs on the main menu.
If the hard drive passes the Quick Test, but in that location is however a problem with the hard drive, run the Extensive Test. This examination includes the SMART Check, Short DST, Optimized DST, and Long DST. To run these tests individually, select them from the Difficult Drive Tests menu.

If the difficult drive fails one of the tests, write downwardly the failure ID (24-digit code) so you have information technology available when you contact HP Customer Support. The information is likewise available in Test Logs on the chief bill of fare.

What to do when the calculator starts into Windows normally

After you take completed the troubleshooting process and your computer has booted normally into the Windows operating system, you should:

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