Galaxy s3 showing charger as USB connector

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http://forum.xda-developers.com – Hi , I have Samsung Galaxy s3 which was working fine for last 2 months. Today when i connected my charger it showed as "USB connector connected" same message that comes when i connect OTG cable. Hence my S3 is unable to charge. Again my charger is recognized as OTG cable. It is not rooted its a stock device. Please help. Shall i go to Samsung Service Centre ?? PLs suggest . (HowTos)