I have a black screen with flashing cursor. I have tried f12 as well as f8 selecting safe mode, safe mode with networking and another choice. It says loading windows files please wait, then launch start up repair then reverts to black screen with flashing cursor
More abouttoshiba laptop black screen flashing cursor
That sounds very much like a HDD that has failed.
Yes, everywhere I looked said it sounds like the hard drive, but then I actually took it in to a shop, and it was the motherboard, so it's hard to tell.