Please share the system model.
You can try using your system in ‘Safe mode with Networking’ and see if it exhibits the same behavior.
Steps to access ‘Safe mode with Networking’:
Check if the issue persists there.
To be sure about the issue with LCD, you can check if the computer works perfectly fine with external monitor. Also, you can run a test on the LCD of your computer to be sure of that You can watch the detailed steps and how to run LCD BIST from link: http://dell.to/R6XKBV.
You can also check the pixel policy: http://dell.to/XcmeJU
Please reply for further clarifications.
Thanks and Regards,Chinmay S#iworkfordell To know more about Dell’s products, services and drivers & downloads, please go to http://dell.to/10GaKAc
I did the tests and all the black spots still remain. What. Could be the issue? Is it fixable?
A display with 1 to 5 fixed sub-pixel is considered normal and within industry standards.
For more information on this, you can refer to link: http://dell.to/XcmeJU
Could I send you a picture of it? I need your email add if possible
You can also paste the screenshot of same here.
While replying to this thread, you can click on the option to insert image and can upload the screenshot of same.
As an example image is shown below: