Nokia 1200 may be white screen problem is many reason.Now I share What is the reason for this problem.
1.If Damage display
2.If broken rebon and display base
3. If broken display ways
4. If short display pin.
1.If Damage display
2.If broken rebon and display base
3. If broken display ways
4. If short display pin.
How to repair this problem : If your phone is effect this problem then first check display next check display rebon and display base after that check display ways.If they are ok but problem still then make this jumper following this picture.