[dead screen? gone all white]

and how do i do a hard reboot to see if it will come back on

[dead screen? gone all white]

i have a paranormal 250c screen has gone white how can i fix it thanks in advance

[Temp control settings]

Paranormal 250c i cannot put my presets in for any wire when i press +and- together nothing happens followed the online manuel but still cant do any presets any help would be appreciated