no download mode..plz help

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http://forum.xda-developers.com – hello friends long time no see...anyway i recently downgraded to gb c-rom by ronnyap..it worked fine but yesterday started to lag so i tried running v6 supercharger..it ran ok like always n restarted...n my phone never switched on phone did not get to recovery mode only download mode.i flashed xxkpe twice with pit -no luck- still stayed on samsung logo..i tried charging.the battery animation did not appear.when i tried recovery it showed kernel panic..n today the phone does not start- no boot animation even,no download mode..its like my phone d (HowTos)