In this article I want to share some solutions to improve mobile phone that has a problem with the Contact Service.
Mistakes like this on mobile phones means that the software can run normally, and therefore the ability of IC Power (CCONT) can work. Function selfttest running when power is turned on and the software is run from flash. If there is selfttest that fails, the text "Contact Service" will be displayed on the LCD. Errors in general:
* MCU ROM checksum fails, try the program (flash) your mobile phone. If your phone is still not right after the program (flash), soldering machine and try to update your phone software once more

* Interface CCONT failed, most likely due to CCONT damaged or defective soldering or less good. Mistakes are almost certainly caused by MAD or PCB (track) is damaged.

* Parallel / serial COBBA failed, possibly due to the IC COBBA damaged or defective soldering or less good. Try to replace COBBA. If it still fails, the error caused by MAD or PCB (track) is damaged.

* Check software

Good luck, and good luck ...

Labels: Phone Service