brothers contact service can also from sim contact short to ground actualy when we press on button mobile do self test 20 to 28 in different nokia mobile
if all test pass then mobile start here i am coppying a text which i get from 6230 service manual and iam not software expert but i think thats software actualy contains different commands some version can skip some self test because of that if some time mobile can work by fleshing or change pm please corect me if i am wrong and please tell me how we can edit mcu ppm and pm files
Display Information: “Contact Service”When this error appears in the display it means that one or more of the internal baseband
tests has failed. The baseband tests (self tests) are performed each time the phone
is powered on. The self tests are divided into those performed while powering up (Start
up tests) and the ones that can be executed with a PC using Phoenix (Runtime tests). The
following Start-up tests are performed during power up:
UEM CBUS IF TEST
SLEEP X LOOP TEST
AUX DA LOOP TEST
EAR DATA LOOP TEST
TX IDP LOOP TEST
TX IQ DP LOOP TEST
SIM CLK LOOP TEST
SIM IO CTRL LOOP TEST
MBUS RX TX LOOP TEST
BACKUP BATT TEST
RADIO TEST
WARRANTY TEST
PA TEMP TEST
SIM LOCK TEST
PPM VALIDITY TEST
KEYBOARD STUCK TEST
LPRF IF TEST
FLASH CHECKSUM TEST
CAMERA IF TEST
EXT RAM DATA BUS TEST
EXT RAM ADDR BUS TEST
NAND FLASH ID TEST
BT WAKEUP TEST
IR IF_TEST
If all these self tests are passed, the phone will start up.
and you can test these with jaff by self test
shahid aleem
