Default Problem on start Tab after freeze

Hello everyone

This thread may dupblicated, srry about that!
I have my tab running rom 4.1 . Yesterday it freezed, battery may be low , may empty ( not sure ). I plugged in on charged but can't make it start again. Try hot button start (Power + Vol+) but can't see logo
What problem is ? Can anyone help me pls?
Thaks all
All the best