White display blank display in Nokia 5250 can be due to water damage or damae of thee ic(s) in cell phone.so look at diagram bellow and be satisfide about these parts in first step.in diagram below you can see lcd display jack and display ic in red lines.Nokia C2-03 Mic Problem Solution Jumper Ways Microphon
if these parts components are broken and damage then replace htem to
solve display problem in nokia 5250.it will solve white display blank
display problem in cell pohone.
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