Default stuck on cwm/ before bootscreen

hey guys,

i was partying and my phone had a total blackout. i thought i broke it physically.
some days later, turns out its actually working. i can access download mode and recovery mode. i wiped all caches and reinstalled cyanogenmod. everything working fine until here. as soon as i hit reboot, the phone shows a black screen with the grey battery on it (as if battery was too low to boot). its not possible to start the rom. i hava a european sgs III gti 9305 with cm 10.1.3 flashed

any suggestions?

would appreciate any help