HT204308: Find the serial number of your Apple product
Learn about Find the serial number of your Apple product
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May 6, 2014 10:43 AM in response to gail1216by sheila_m.,Hello Gail,
It sounds like you can hear your Mac start up, but you do not see anything on the screen. I definitely understand your concern with this.
I found an article with steps to troubleshoot issues with displays. This article is for internal and external displays. I wasn't sure if you were using a Mac Pro or MacBook Pro from your post. If you are using a Mac Pro, follow the steps for external displays, but if you're using a MacBook Pro, follow the steps for internal displays. I recommend reviewing the full article, but this step specifically stands out to me for the issue you described:
Reset the system
You can reset the Mac's parameter RAM and SMC.
You can find the full article here:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Thank you for posting in the Apple Support Communities.
Best,
Sheila M.
