Strange graphics behavior from my (loved) Pavilion DV8

[UB4Tee]

Hi,

i have my DV8 since a couple of years and upgraded it from W7 to W10prof.

Since the upgrade i get neither an post Screen nor the screen with the window sign and  the cyrcling points during start of my Laptop. Only if I connect a 2nd Monitor via HDMI I can see the post and the startup Screen on these 2nd monitor.
So far so good - for me, it does´nt matter, because at last the "Lockingscreen" appears after startup on the laptopdisplay in the past.

Now sometimes the Laptopscreen kepps black after switch on as long as i close the Laptop and awake him from hibernate mode  to working mode during open the displaycover. 

Also, if I have the 2nd Monitor on the HDMI port connected, i can switch between "expand screen" and "second screen" but not between "only laptopdisplay" or "mirroring display"  And I have the feeling, that there is a automatic switching between the modes like pressing Fn + F4.

I have uninstalled and installed  the displaydriver multiple times but the behavior gets worse with every MS Operating system Update.
Have anybody an idea?

I am afraid that my graphics chip get (or already is) defect. Pls help

[Echo_Lake]

@UB4Tee

Thank you for posting on HP Support Community.
 

Don't worry as I'll be glad to help, I have a few troubleshooting steps we could try to fix the issue:  

Firstly, perform Windows Update and HP Support Assistant: (do not skip any troubleshooting steps if you feel steps are repeating) 

To check for updates now, select the Start button, and then go to Settings  > Update & security  > Windows Update, and select Check for updates.

Install updates from HP Support Assistant: Go to Download HP Support Assistant to install the tool.

1. To open HP Support Assistant, double-click the HP Support Assistant icon .
2. Click My devices in the top menu, and then click Updates in the My PC or My notebook pane.
3. Click Check for updates and messages to scan for new updates.
4. Review the list of updates. Updates with a yellow information icon are recommended. Updates with a blue information icon are optional.
5. Click the update name for a description, version number, and file size.
6. Select the box next to any updates you want to install, and then click Download and install.

And, also run BIOS Update: Follow steps from the link: https://support.hp.com/in-en/document/c00042629

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.