Blackscreen - 0.34a - hekate loads - but shows battery at 0 percent

hey guys,

got a switch here which does not start up. black screen. amp meter shows that it draws 0.34a. hekate does work but it show that the battery is at 0 percent charge. but the switch does not turn off. can dump the emmc. no drop damage etc. is this an indication, that the bq ic may be damaged, or should one look more into the m92t36 ic? didnt opened it yet but i guess its a hac cpu 20.

best regards

Possibly fuel gauge issue?