Micromax Q427+ - FM not working; FM Troubleshooting

Q427+ L3 Service Manual
 Check the earphone normally or not, then change it;
 Check the first pin of earphone, well connect with earphone line 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.
17. WI-FI is not working properly:
Solution:
Earphone
CPU
Power IC