Hi Malcolm,
Thank you for replying.
I have actually not seen/observed the auto power save option (I will check that and let you know).
Regarding the camera getting hanged, I have tried the below steps:-
1. Half press the shutter release button
2. Try pressing the display button/Set/Play/Delete/Menu/Direction keys/All other buttons/Turing the Aperture dial/shooting modes (nothing worked actually

)
3. In the end, the only thing that worked was removal of battery manually and re-inserting it.
From the scenario, what would be the ideal setting to ensure that the application remains stable on camera.
Also, I have observed another functionality regarding AF.
When the AF in ML is set to - Trap Focus (Continuous), and if I use the Auto mode to capture pictures, the camera starts capturing pictures non-stop, then again I had to remove the battery and re-insert it.
I think I found a fix for that later by disabling the Trap Focus (not sure if that is the permanent fix).
Hope this helps

Thank you once again for your advice.
Sincerely,
Prabhath MP