Ask Mac Questions and Get Answers from Experts ASAP
Hello & Welcome to JustAnswer.
Thank you for your question. I will do my best to assist you.
May i connect with you remotely to troubleshoot the issue directly? Thanks
Have you restarted your computer?
Is it continuously blinking?
Operating system you are running?
Is it Mac or windows?
If you are not able to perform anything you need to run a recovery.
Follow the steps to perform recovery.
Let me know after recovery
Hold down Command-R on your keyboard immediately after pressing the power button to turn on your Mac, or immediately after your Mac begins to restart. Continue holding until you see the Apple logo or a spinning globe. Startup is complete when you see the utilities window.After starting up from macOS Recovery, select reinstall mac OS , then click Continue.