P55 not switching on
 

Hi, Everyone wishes,
I'm a Mobile enthu just entered in to this forum,
I've started trouble shooting a P55 in my home. So, keenly following some good guidance's in this forums. The basic problem is the phone is not "switching on" the mechanics tells that it is a software fault / broad problem flash problem /drive problem etc., etc. Panasonic support is not available for online purchased phone. Hence, I got myself into the trouble shooting, bit of subject interest. Hope this this forum would guide me to finish my task.
Thank u all in advance.