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BQ40Z80: The aging experiment caused the chip to fail to communicate

Part Number: BQ40Z80
Other Parts Discussed in Thread: EV2400

Dear Expert

At present, it is found that among the 36 pcs aging products, 6 pcs aging PMBus cannot communicate with the MCU, and the battery stops charging and discharging. Remove the battery protection board, choose EV2300 communication, still can't communicate.

Do the ABA verification experiment with the customer, and change to a new BQ40Z80, the communication can be normal and the normal charge and discharge can be realized.

Could u help to check the schemetic  ?

D1062 Protel Schematic.pdf