Nokia 7250/6610/7210 Keybort foulty
 

Hello ,
dose somone know about this foulty, see title, in my case one line of
buttons is not working, like 1.4.7.*. or 2.5.8.0.
Any suggestion will be appreshiated.
Thenks.
Gennady

Well ..

That means that there is a brocken linke across the pathway of the mensioned columns ( 1,4,7,and *)/ ( 2,5,8,and 0 ) from the swithes pads on the keyboard's PCB through the connector X301 , and the Combo-Resistor Z300 to the UEM.
Of corse U need a schematic , downloade one then follow the pathways.
Check to resolder with the tip of fine solder iron the connector of the required column ,try to reflow Z300 and tell the results :)

most likely the filter has gone, change i think Z300

Someone can post link for good Schematic/Service Manual, what i have hier is Level 1-2, no components discription, unfotunatly.
Thenks in advance,
Gennady