its kinda hard to explain. but every time i reboot. there brightness changes for a while. ( few seconds then go back again ) as seen in the video. the issue start when i try to format the notebook ( clean the drive ) then its stuck at 30%. after that i forced restart the notebook. that shows me a page from the bios that ask me there a request to delete everything or cancel. i choose cancel. then the notebook restart, and the issue started.

i installed new clean OS ( using usb stick ). and Newest VGA drive. the issue still persist. but when i switch to intel onboard vga ( using the control panel ) theres no issue.

anyone have any idea how to fix this ?

https://youtu.be/pdiTWuS3acw