Black Screen

Would recommend to run Pre-boot system assessment test to check the LCD functionality. To run the test, hold down the FN key and press the power button which will initiate the test. In case you are able to see the test running on the screen, it means it’s not an issue with the LCD. Color bars on the screen indicate functional LCD.

However, if the screen is dark, then wait for a few minutes, you should hear beep sounds from the computer. It could be an issue with the LCD or the inverter cable. 

You can refer the Dell Article 266787 on www.support.dell.com 

http://dell.to/oe1Qg1 

Would suggest connect External monitor to the laptop and check if you get the display on the external monitor. 

If the external monitor display is fine, then the issue could be with the LCD. 

You can also try reseating the LCD Cable. If reseating the LCD cable also doesn’t resolve then would suggest you to replace the LCD.

Refer to the User's Guide to find out if LCD Cable is resettable, if it is also how to reseat it.

http://dell.to/IBDZRb 

Let me know if you are getting any error messages. 

You can also refer to the link for No Display issue: 

http://dell.to/SpVres 

You can refer the Dell Article 266826 on www.support.dell.com 

Please respond for any further assistance.  

Thanks & Regards
Rathish C
#iworkfordell