The charge bank management chip is broken and needs to be sent to a special repair shop for repair.
If the cost is too high, it is better to buy a new power bank.
I hope the maintenance cost is not too high, if the price is high repair is not cost-effective. This chip is liable to break down again if repaired.
Buying a new one is not very expensive, it is recommended to consider buying a new charging bank.
The charging bank chip is broken can be repaired, you can go to the mobile phone repair shop to repair it