Hello. My MacBook has a question mark blinking and it won’t stop and start
My MacBook Pro has a blinking question mark and won’t turn on.
MacBook Pro 13″, OS X 10.11
Question marked as
This is a sign that your Mac can't identify your start-up disc.
Apple's support document If your Mac starts up to a question mark has some procedures which should help. The last resort is to contact Apple support.