Toshiba laptop black screen no cursor

Ok so I had this problem last night , my laptop became dead slow at 1st then while browsing it hanged completely and I could not even start task manager , I restarted it by holding the power button and it showed toshiba logo and then a black screen , with blinking cursor, I turned it off after sometime because it was not booting and started looking for the solution. I found the remove battery n charger , hold power for 60sec thing but when I turned it on before applying the method it booted normally now after some hours it became dead slow so I restarted it by going to start > restart and it restarted but again the black screen and white cursor , So after trying 10 times f8 it did not work (win recovery ) so i pressed f12 on 11th attempt and changed booting to fast from normal now it did not solved the problem but created a more deeper one , now I do not get the toshiba logo or f2 f12 option or anything it just goes to black screen with no cursor at the left top corner. I tried the battery removing thing , no help.Also the
f 12 is not WORKING

i want one of the following things

1. FIX THIS ISSUE, START WIN , MOVE IMP FILES FROM C AND THEN RESTORE FACTORY SETTING
2. JUST RESTORE THE WIN FACTORY SETTING
3. ANOTHER INFORMATION REGARDING THE SPECIFIC ERROR CAUSING THE PROBLEM

not to forget num lock light is on , fans are working