BIG PROBLEM! (Moved from BSOD)

HY i have a emachine eM350 series MODEL NO NAV51 DC RATING 19V--------------2.15A(2,15A) when i try to shut him on it appears a blue light at the sign of a bulb and it dosen`t shut off.i specific that it dosen`t make any sound.Can you please help me ray:ray:ray:



Thank you very much