Micromax Q427+ - Earphone not working; Earphone Troubleshooting

Q427+ L3 Service Manual
 Flash the handset with latest SW
 Check the earphone normally or not, then change it;
 Check the earphone jack normally or not. then Re-Solder earphone connector or change it
 Check the Power IC normally or not, then Re-Solder Power IC or change it.
 Check the CPU normally or not, then Re-Solder CPU or change it.
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15. G SENSOR not working:
Solution:
 Flash the handset with latest SW
 Check the Sensor normally or not , Re-Solder Sensor or change it.
Earphone
CPU
Power IC