Link status- yellow light malfunction on DIGI ConectME?

We are using the Digi Connect ME as a part of the network communication module for many years. The issue I need technical support is relative with disappearing of Yellow Link status/ Integrity light. Even if I flash my modified setting to factory default, the yellow light is not coming ON. Placing the failed communication module in a different device is not changing status of the Yellow light as well.
Is this issue fixable or the device is permanently failure?

What is the part number of this device?

PN: (1P) 50000878-01