Prolite E435S Colour instability.

I've a problem with the moitor in that it's not keeping the luminance and chrominance settings.

I've of course tried the alignment menu.

Switch off power putton
Remove power plug wait for click or 10s
Insert power plug

Hold in + and -
Hold in power button
Wait for Green LED
Release power utton
Release + and -

Service Tech Alignment Menu will apppear Top RHS
Navigate to Autocolour option
Select with Menu button
Navigate to Max Brightness
Set to 100

Is there a permanent softfix to this that doesn't involve keeping the power on or opening the monitor up in anger?