I was having trouble to install windows 8 in my dell inspiron n5110.
At the end of the installation is tries to boot up and display black screen.
After googling, I understood that the problem is happening due to the graphics card. Following steps solved the problem:
1. I connected the computer to another monitor, So the black screen is not coming anymore in the extended monitor.
2. Then update the BIOS, I restart the computer 2-3 times and fixed the problem.
Hope that will help you too.