GX29 Keypad Problem

[mbcommunication]

Hi have got here a GX29 that has suffered some water damage have got it all cleaned up and powering on but there is a fault in the keypad on keys 4,5,6,7,8,9, left soft key and left and down direction keys also the power key will power on the handset but not respond when the handset is powered on or charging, any ideas where to start looking as all contacts look clean and the is no more damage visible i have many GX25 here for parts if there is something that could be replaced.

BR

MAttYB

[shahzaadbutt]

check hardware 1st......

[mbcommunication]

Have check and cleaned all hardware with sonic bath and to the eye i cant see anymore damage but have not been able to find any Sharp scematics or pics so am lost on what to try next anyone got any ideas on where i should be looking or some pics as said before i have many GX25 parts if they could be used in GX29