AirPods case shows 3.5V at pins but doesn’t charge the earbuds

Hi,

I received an AirPods case for repair. The problem is that the case won’t charge the earbuds, and the earbuds remain off when placed inside.

I measured the voltage at the charging pins inside the case, and it reads around 3.5V under normal conditions. The battery seems fine — it’s not swollen and holds a charge.

What could be the cause of this issue? Is 3.5V at the pins normal, or is there another component that might be faulty?

Any suggestions or guidance would be appreciated.

Thanks!