Micromax Q427+ - Rear camera is not working; Rear Camera Troubleshooting

Q427+ L3 Service Manual
10. Rear camera is not working:
Solution:
 Flash the handset with latest SW
 Check if the Camera is obviously damaged, if yes, Replace the Camera ;
 Check if the ground impedance of each pin of the Camera connector (except the ground pin)is low(lower than
grade ),if yes, Replace the resistor of the corresponding pin;
 Check if the series resistors on each network of the Camera connector have pseudo soldering ,if yes, Carry out
repair soldering of the series resistors on each signal line;
 Check the CPU normally or not, then Re-Solder CPU or change it.
Camera
connector
CPU