> -Get the special floppy disc out, insert correct system floppy disc, let the machine boot operation system from the floppy disc. If there’s no accident, the machine would start normally, when A:\> prompt appears on machine, it means the circle dead lock problem of the issued disk has already been eliminated. Afterwards, you can partition or format the hard disk normally. If you try recovering the data on the disk, then please don’t format partition.
3) Check whether the cables connect the screen tightly, you can refer to another post about how to fix LCD screen.