Nokia 1600 1110 Contact service Solution
https://gsmfixer.blogspot.com/2015/07/nokia-1600-1110-contact-service-solution.html
Solution: contact service problem in mobiles occurs mostly due to water damage so you can solve it by normal intensity of heat and clean the board with pure CTC or thinner. Here ia diagram about contact service problem just remove the component as shown in diagram below.
Alternative or 2nd solution is that you can flash the mobile using jaf. Hope this solution diagram will help you a lot.