What's wrong with my Lumia 1020??

[Gerdhardt Morpheus EXes]

How long does it take windows 10 technical preview for phones to finish installing on Lumia 1020? After waiting for about an hour and a half for the downloads to finish and install, my phone's screen has gone dark(meaning I can't see anything) What must I do now. For how long must I wait. PLEASE HELP

 

[Artem Kovyrkov]

try soft reset (volume down and power button at the same time)

 

[Zapella Tiago]

Can you see the system bar? I know there's a bug with this version that the migration process doesn't appears to the user. If that's the case, you just have to wait.