Blank screen after dell and windows logo

Hi
When I try to boot the laptop(dellE7240 win 8.1) it shows fell logo and windows logo but after that just a blank screen with cursor. Advance boot option doesn't show any safe mode option. Interesting enough when last night I shut it down. The power, wifi and the system light were on for quite a while. I did shut it down by clicking shut down and not pressing the power button. Can any help on how to boot the laptop? Or what could the problem be?

several things to try - the led's are a telling sign of a problem.. the black screen with flashing cursor is the OS was not found..

remove any CD/DVD's from drive slots
F2 into your Bios setting a reset the system defaults and verify HDD by bios
verify System Memory is seen and correct in bios

lastly remove and reseat memory sticks and HDD in PC

Thanks for the response. Did the trouble shooting with a Dell Engineer and unfortunately none of them worked.

Posting what actually worked so someone else can also use it.

I removed the battery and tried to restart just with AC adaptor. once I reached the blank screen again, I disconnected the power supply and the laptop shut down immediately.
After that I plugged it in and started the system, lo and behold it started.

Not sure what the exact issue was but its working now and I am hoping it doesn't happen again.