If it does, you may need to replace the LCD/Repair the computer: If the issue does not appear in BIOS, reinstall the graphics card drivers & update BIOS using the above link, If you don’t have an alternate monitor, I recommend checking if the issue appears on the BIOS screen (restart the computer and tap on F10 to access BIOS) If you haven't, please try an alternate monitor to understand if this is either a hardware or a software failure, if the issue does not appear on the alternate monitor, you may need to replace the display assembly on your computer, if the issue appears on the alternate monitor/TV as well, re-install the graphics card drivers & update it from the official HP Website: Click here
