Mac w/retina

jimia0000 wrote:

My screen turns black on startup any thoughts to fix this?

You do not say what exact Mac this is...

See if you qualify:

Service Program—

https://www.apple.com/support/13-inch-macbook-pro-display-backlight-service/

 Reset PRAM:  Reset NVRAM or PRAM on your Mac - Apple Support

 Reset  SMC:   How to reset the SMC of your Mac - Apple Support   Choose the appropriate method.