macbook pro retina 15-inch does not boot up all the way

Reinstall Lion To Yosemite Without Erasing the Drive

Be sure to back up before proceeding.

1. Restart the computer and after the chime hold down the Command and R keys until the Utility Menu appears.
2. Choose Disk Utility from the Utility Menu and click on the Continue button.
3. After Disk Utility loads select the indented (usually, Macintosh HD) entry from the side list. Click on the First Aid tab, then click on the Repair Disk button. If Disk Utility reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button.
4. When the process finishes, quit Disk Utility and return to the Utility Menu.
5. Select Reinstall OS X and click on the Continue button.

Newer models like yours no longer chime at startup. What you must be sure to do is to hold down the keys immediately after pressing the Power button then hold those keys down until the startup begins with the display of the Apple logo. If this too fails then indeed you may have a bad drive. In which case, make an appointment at the Apple Genius Bar for service. If you need to find an Apple Store - Find a Store - Apple. If you did not purchase it from Apple then you will need to look to the vendor for service or How to find your nearest Apple Authorized Service Provider (AASP) or Distributor (AAD).