[sachitmaskey]

Problem solved

My problem is solved now n I thanks u all guys 4 makin it a success.I tried it to repair it since months n today i did it.I never gave up my hope n kept fightin n today i won it.U guys really helped me...

How i solved the prob:

I upgraded my mp4 with wrong firmware then black screen apeared then i followed dead player recovery process.After that i installed the right firmware that i used to.And Bingo !!! it's not virus or any format error it was firmware error.Thanks once agan...
sachitmaskey