Laptop screen wont turn on( all black) but power on light turns on then turns off and stay like that

[MA122]

So basically my coumpter all of a sudden had a blue creen and  tried to fix it  but the blue screen keep coming back until now my laptop wont turn on and I did a BIOS i think that what I called and i think i by accident touch something on the coumpter and it stop turing on. When ever I turn on the laptop the power light turns on then stays off, it dosent stay on. I dont know what to do. I was wondering if there was a way to fix it or should I get a new laptop. And I got this laptop from walmart and a lot of people say walmart laptops arent that good. And you shouldnt buy a laptop from walmart.

[A_Gayathri]

Hi @MA122,

Welcome to the HP Support Community

I understand you are facing an issue with your HP Laptop, The screen is not turning on Not to worry I will help you to get a resolution to resolve the issue.

May I know 

Do you see an HP Logo when you try to turn on the unit and then the screen goes blank or blue screen, If Blue screen Have observed any error message?

Please try the following Troubleshoots steps. 

1.    Turn off the Unit.

2.    Disconnect the AC adapter.

3.    Remove any discs from the disc drive.

4.    Remove memory cards from the card reader slot.

5.    Disconnect all nonessential peripheral devices, such as printers, scanners, external hard drives, and USB flash drives.

6.    Disconnect the AC adapter press and hold the power button for approximately 15 seconds.

7.    Reconnect the AC adapter, and then turn on the computer.

Step 2

Turn off the unit and please press and hold the Windows key + letter B key and the power button together for 30 seconds after 30 seconds, 1st release the power button but keep holding the Windows key and B key for ten more seconds and then release these two keys If done correctly, you will see the display flashing once. Please attempt it thrice as this step and Restart the unit

Step3

The unit has to be turned off, Press Win+ V while holding these two keys then Press the Power button, continue to hold all three keys for 30 seconds and then release the Power button first and then release these two keys Please attempt it thrice  and then you may get a Pop-Up CMOS Check and it will restart the unit 

Even if you don't get a Pop-up restart the unit manually after 3 attempts.

After the above  troubleshooting steps if the unit  turns on 

click here and follow the troubleshooting steps-  HP Laptop Starts but No Display | Black Screen |

click here and follow the troubleshooting steps- How to Fix a Black Screen on Your Computer

Please  update Windows and HP support assistances updates 

And update Bios and other drivers please click on the link. to update the drivers. 

follow this link to run the test hardware test 

Also, try updating the computer:

Step 1 Windows Updates - 

1) In the search box, type, and open Windows Updates. 

2) Check for updates. 

3) If the updates are available, click on Install and restart the computer. 

Step 2 HP Support Assistant Updates:

1) In the search box, type, and open HP Support Assistant. 

2) Check for updates. 

3) If the updates are available, click on Install and restart the computer. 

I hope this helps! Keep me posted. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!