E398 flooding, how to do buttons not working?

Users questions: Mobile flooding, power key can only begin, fix available, but one day it malfunctioned. It is only the number keys 3,9, *, #, and switch, up and down keys (not Move), return, to confirm key is available, other figures, to allocate and receive the keyboard does not work, use the camera function, the tips "System Busy, please try again later. To repair several times, said CPU may be bad, to get a new one. Do not know is not the case, ask you heroes solve problems!
Experts answer: I was engaged in mobile phone repair Motorola e398: not the CPU, should be within the base to have bad sectors or key board, photo camera I should be C or camera head question.
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