samsung s500 keys not working

[France]

hi!
i have a samsung s500 with keys not working only on/off key works.please help me

[France]

hello
thanks much;for i have tried the removal of micro and it works.but i have a e330 with the same pb.
thanks for any solution

[OLYMPIOS]

please listen ...
the most of samsung phone have tha same problem .
1 microphone remove & check
2 volume swith remove & check
3 charge conector clean -remove & check
good luck to every1

[BouRRi_GSM]

if not repaired
this problem is caused by CPU