Glitchy grey screen upon start up + screen freezing

[Kremlin]

Hello, I currently have an HP Notebook purchased in late 2016, product no. Z4L83UA#ABA. Recently, I have been experiencing an issue where the laptop would display either a grey screen with a black bar on the bottom or a solid white screen upon waking from sleep mode. Example below in figure 1:Figure 1This screen also displays briefly upon turning the laptop on. Although it happens randomly, it seems to occur more often when the laptop is asleep for an extended amount of time, that is more than 5-10 minutes. Usually, after waiting for a while, usually a minute, the display cuts to the lock screen as per usual. 

Recently, however, it has been displaying the same grey screen with a smaller black bar as well upon booting and waking. Example below: Figure 2I have recently been having more difficulty getting to the lock screen and have been forced to cold boot the computer in order to reach it, however, the boot screen usually displays this for some time before showing the HP logo and loading windows. Furthermore, waiting for the screen to cut to the lock screen no longer works, as the grey + black bar screen has been growing glitchier the more I wait, changing colors until it looks like this: Figure 3Additionally, I have also been experiencing issues where the screen would freeze and become pixelly, showing a greenish or purplish tone each time. Example: 

Usually, it reverts to normal and unfreezes after some time, however, ocassionally the screen gets glitchier and glitchier until it fades to a solid white screen. Example: 

I do not know of any event or trauma my laptop could have experienced before this incident in order for this to happen. This laptop has not been dropped, abused, or met with blunt force as far as I know. However, I recall waking from sleep to a black/white screen with no color a week before this started. However, a quick restart fixed the issue. 

As far as I know, the background programs still work. Even when the screen is glitched out, I am still able to hear the audio, videos, or programs in the background play. 

I am having a difficult time diagnosing what the problem is in order to fix this. Searching online, I have tried the common solutions of updating drivers, reverting driver updates, reinstalling drivers, reverting windows updates, and downloading later windows updates. Unfortunately this has been to no avail. 

Does anyone know what the issue could be? Could the laptop be simply showing its age? Though it has only been 2 years. Any help could be appreciated.

Thanks in advance!

[asmita6658]

@Kremlin

 
Greetings!

 
Welcome to the HP Community. This is a great place to get support, find answers and tips to your technical queries. I have reviewed your post and I understand, there's an issue with the display.

Appreciate you trying the troubleshooting steps. Don't worry, I'm here to help! 

Let's try these steps -

Step 1 Adjust the Screen Brightness -

1) Right click on the Start or Windows icon and open Control Panel. 
2) Click on Hardware and Sound.
3) Click on Power Options. 
4) Look for Screen Brightness located at the very bottom of the screen. 
5) Move the slider to adjust the brightness. 

Step 2 Re-install the Display adapter -

1) In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results.
2) In Device Manager, expand Display Adapter. 
3) Right-click on the Display Adapter, and then select Uninstall device > Delete the driver software for this device check box > Uninstall.
4) Restart the computer. 

If the issue still persists, try updating the computer -

Step 3 Windows Updates troubleshooter -

Click on this link to run Windows Updates troubleshooter.

Step 4 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 5 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. 

Also, try connecting the PC to an external monitor to check for the brightness and boot the PC in BIOS to check if the same thing happens in BIOS -

1) Shutdown the computer. 
2) Turn the computer back on again and repeatedly tap on the ESC until a Startup menu appears. 
3) Press F10 once for BIOS. 

Hope this helps!

Let me know how that goes.

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Have a great day!