same issue here...i put my find 7 in the freezer...then the display come out again...try it out. but make sure wrap your phone with a plastic bag first... black screen again everytime i restart my hp. have to put it in the freezer again.
Turn off your hp first before putting it inside the freezer. once the hp become at least less than 10°c you can try to turn on you hp.
Last edited by cgfusion; 26th May 2015 at 11:08 AM.
Reason: adding detail.