Solved! I completely switched off the laptop, then I dissembled the laptop and assembled it back just to see what brand of the RAM, bu

[abdulhanif0799]

it says "no bootable device" even though I have set sequence boot first option is internal HDD

 

[USAFRet]

it says "no bootable device" even though I have set sequence boot first option is internal HDD

Something is not connected properly.

 

[abdulhanif0799]

MERGED QUESTION
Question from abdulhanif0799 : "cannot start, it keeps restart after essembled"

I have solved the "no bootable device" but when I try to start the laptop it keep restart and says "attempting repairs" why?