Hold the power button until the system shuts off.  Then power up and tap F12 a few times immediately.  This will bring up a boot menu.  Choose "diagnostics" and run the system diagnostics. If any errors arise (such as 2000-0142), record those and post again here.  
I got inspiron 7300 2 in 1 & i just can’t log in . My screen was flickering now its stable but I can’t log in 
Can’t log in . I got inspiron 7300 2 n 1 . It has no battery outside that i can 
remove