Please report back and let me know what you find. If the screen flashes white running diagnostics allow the diags to continue, eventually an alarm will sound, when it does press the letter N and see if the screen starts flashing different colors or continues to flash white. If the image looks good the entire time then the LCD is likely fine, and has no defects. If you can see the contents of the screen start the system and tap F12 and choose diagnostics and allow the test to run. Diagnostics should start, allow all of diagnostics run and see if at any time the screen flashes white or if you get error messages. Start the system holding down F2, just press and keep pressing F2, holding the button down while starting the notebook. I suggest running diagnostics and perhaps we can get more information what is going on here.
The confusing thing about this is that if the video driver is corrupted then the external monitor should have the same problems as the internal screen does.
You also mentioned that the internal monitor doesn't flash while in the BIOS, that you don't have a white screen while starting the system is this also correct? This on the other hand implies that this is a software issue with Windows or the video driver. This is what I understood from your post, that sometimes the LCD on the notebook flashes, you have tested this with an external monitor and the image on the external monitor is good even though the internal LCD flashes, is this correct? If so then this implies that there is a problem of some short with the LCD, it could simply be that the data cable doesn't have a good connection and needs to be reseated. If the diagnostics ran fine and you noticed no problems but they continue in Windows then I suggest reinstalling the video driver from the following link. If the problem happens while diagnostics are running then the video adapter will be defective and you will likely need to replace the system board and processor.
Otherwise this is a problem with the video adaptor. Then check to see if the white screen goes away and it starts flashing solid colors, this again is an indication that the LCD is fine. If you all see is a black screen after logging in, press Control + Shift + Esc on your keyboard this will launch Task Manager. When you hear the warning siren press the N key. If the screen is white while running diagnostics you may not see the system running diagnostics, you should hear an warning beep or siren. If it does then there is no problem with the LCD. After pressing N, the screen may start flashing solid colors. Press N when the video diagnostics ask if the video test ran correctly. Diagnostics will start, if you can see the screen you will notice video diagnostics. When the problem happens next, shut the system down and restart it while holding the F2 key.
You can read more about me here.If you don't have access to an external monitor you can try the BIST test.
In my spare time I also make PC utilities that can be downloaded from RL Vision. Currently I work at Nexer Worklife specialized in SharePoint, Office 365 and Azure development.
As a workaround, click the full screen button, and then select theater mode. In the bottom, tick off 'Override high DPI scaling behaviour. This happens randomly for all different users and some users all the time. We have to clear the cache then user can log back into teams and launch it. We get this in Citrix sessions / laptops or desktops and even macs. Locate application in task manager (wfica32) 2. White screen logging into teams Some users experience a white screen at login for teams. Problem: Black window on extra screens and scaling issued. You click the icon in the lower-right corner of the video, and the video doesn’t resize leaving the black background in the full area of the page. 14.0 on a Intel Dell with two extra screens. I've been a computer enthusiast for 20+ years, working as a computer/network technician as well as a games, software & web developer. In IE11, after starting a YouTube video using the YouTube HTML5 video player, full-screen mode might not work. My name is Dan and this is where I share tips and thoughts on computers and development.