Very strange E710 contrast problem

[Burnt Cobba]

hi mates.

Got this one with the usual contrast problem. Usually shorting pins 1 at the bottom with the 2nd pin on the outside lateral side will fix this. On this phone shorting the usual 2 pins will result in white screen and the phone freezes. What is more strange is this.... When shorting the usual pin 1 and the 3rd pin the screen comes perfect .... but the phone will be shorted and thus drain the battrey more quickly.

Anyone can help on this pls?

thanks

[lahoot]

try this code without sim..*#0523# and press down navigation key for seting contrast