white out, screen isn’t working

Orchidphoto38 wrote:

Computerscreen is all white, but the computer seems to work when switching on, but again no screen

Mac Pro

Not sure what exact Mac this is?

or

what macOS you are currently running?

The Mac Pro is a Desktop...(?) Are you saying the monitor is white screen..(?)

Try resetting the SMC https://support.apple.com/en-us/HT201295

Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

To trouble shoot further you can:

—Try a SafeBoot https://support.apple.com/en-us/HT201262

Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.

Login and test. Reboot as normal and test as caches get rebuilt.

In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a reboot will put it back to normal mode.

This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.

—Test issue in another user (or guest user) account  https://support.apple.com/en-us/HT204443

This will tell you if it a universal issue or isolated to your user/admin account. 

Uninstall all third party apps that are Cleaners/Optimizers/VPN/Anti-Virus

You can read this...+White

"If your Mac starts up to a blank screen A blank screen (black, gray, or blue)"

https://support.apple.com/en-us/HT210905

If you have an alternate external monitor plug it in as a test—