Default [Q] (Q) blinked red light

My phone died last night, because of a fall from a bed.
but unfortunately, every time it has been entered into the system, the red LED light flashes 3 times and my phone dies.
I try to get into fastboot, there is a warning that "baterry voltage too low".
I try to mengcharge battery, but again its LED lights flashing.
I have even tried to use direct current from the power supply, but still the same, in fastboot "battery voltage too low"

whether it is hardware or software issue?
NB: I can still go into recovery mode, still can install the radio rom and files

sorry for my bad english because i'm from indonesian,and i hope there is a quick help