Hi @sydbent2016 ,
What happens if you leave the charger connected, does it work OK then?
If so and it only has problems when on battery power, after 4 years in a box, most probably the battery needs to be replaced.
Even though you have charged it, it may not be able to hold the charge when under load etc.
I suggest that you start with replacing the battery and then after the new one has been fully charged see if there are more problems, if any.
Here's a link to the ifixit Acer Iconia One 7 Battery Replacement guide, that may be of some help.
Batteries are available online. Just search for Acer Iconia One 7 battery to get results for suppliers.
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