Screen flickers

nlas129 wrote:

My MacBook’s screen flickers when the integrated and dedicated graphics cards switch

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

if no resolve

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

For further support—

Call (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

https://apps.apple.com/app/apple-store/id1130498044?mt=8

or call AppleCare Support at 1-800-APLCARE.