KG800 numeric keyboard not working

[burkoo]

I have KG800 with numeric keyboard not working.

I've tried with mainboard from another phone and it IS working, so the prob is in the mainboard ... can anyone tell me where is the faulty part?

[MUTUAL]

same problem here
i dont think so ant solution for this

[robhall99]

have you tried removing side button membranes this has worked for me a few times

[kosturon]

Problem is not in the lower board (keypad). I change two of them but no result. Any other idea???

@robhall99

With removing of membranes you cannot solve anything.

[abdel7650]

same problem .