i just install windows 10 on my lumia 1020 , i follow all instractions that are given at windows insider , but it only show lock screen after installation , when i open lock then it shows batery icon and network icon on top . and all black screen , please help me/.. i connect it with pc it works . it show memory i can add or delete photos or videos , and also i make a phone call from another phone it also works ,, please help me...