In first step restore factory setting in Nokia C2-03. Then make a full flash (software firmware) installation. And the third step is to check hardware diagnostings. After dis assambly of phone check the whole mother board carefully.If there is some rust or carbon on board then clean it with electronics cleaner and apply some heat with hot air. So that the mother board can be dry.
If mother board can not be full dry it can create carbon in future so keep in mind it should be dry.Do not apply much heat as it can harm your skin and mother board of cell phone.
In above diagram as you can see there are different color lines. These lines are indicating tracks that are used in camera function so check these paths and apply jumpers as shown in above diagram.
for more detail and new tips and tricks about cellphone service problem keep visiting this page we will update cellphone service diagrams timely with new cellphone diagrams.some related post are also given bellow you can read them also for more information about cellphone.