Just refer to the solution below and follow some step by step procedures on how to diagnose the power switch problem
Nokia 5320 Power ON-OFF Switch Connection Tracks
Repair hints for Power Switch problem on Nokia 5320 Xpressmusic:
1. Check the power switch assembly, if the assembly is damaged replace the switch.
Sometimes even if the powerswitch is not not visually damaged, see to it that it still working by using a
2. For lifted button switch solder terminal pads on the PCB board, manage to re-establish the switch to its original position and bond it perfectly so that it won't easily break. Then manage to reconnect the power switch line paths and the ground connection. If you can see an empty components solder pads just below of it, you can connect it to that spot. that is also connected to the power switch.
3. The most harder part on power switch troubleshooting is by removing the AVILMA IC and trace its connection from the solder ball bump (D9) to the power switch terminal, The rework or reball the AVILMA again. If you get into this level, this may take an extra expertise on soldering techniques. So goodluck!