I also faced this problems in my PC.There are many solutions of this problem.You can do the following procedures to get rid of no display problem.:-
1. Check you RAM for proper inserting.
2. Open processor and install again.
3. Clean your whole system.
4. Shutdown your system by taking power cable and again insert cable to start PC.
5. You can refresh your BIOUS setting.
6. Check your data cable.
7. Check your display adopter.
8. Properly tight all screws.
By acting upon on these points you can solve your display problems.
