[Q] ACER A500 tab, android introduction only ,hang up - General Questions and Answers

hello good day to all...
need help,,,,,,
there is an ACER a500 tab here,,
the problem are,,
- it can only power on when the charger is plug-in but if you un-plug the charger it power-off
- if it is power on , it only shows android introduction then hang-up, you cant power off unless unplug the charger...but if the chager is plug-in,you can turn on and off but still only in introduction of android and the clock, lock symbol is displayed....
action taken :
- reset the botton
- hold volume-up then power ON then lock and unlock botton for 20secs...
but still same problem....
please some solution needed...........

hello good day....
please help....................

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