(Redirected) Inspiron 5520 is not booting up with Windows 10

Hi Friends,

My Inspiron 5520 is not booting up with Windows 10. When starting it is showing Dell logo and it progresses.. I can see right bottom the options Like F2 SETUP,F12 BOOT OPTIONS.

But nothing happening after this..I am getting a black blue mix screen with cursor is blinking with circult (windows processing sign). If I kept on system - once in a whiel its blinks with / black screen nothing loading. Sometimes its showing a Square of blur colors in middle of the screen but doing nothing.

Trid multiple times to check BIOS and F2 Setup or F12 with diagnosing but nothing worked.

I have successfully completed - Dell Pre-boot System Diagnostics without any issues - all tests passed but still its not booting. (I have disconnected all the connectors like hdmi, wireless mouse etc.). Problem not resolving.

I am totally stucked..My laptop's warranty period is over. I need your help

Thanks in advance.

Regards,
Anand