Find the unit reference code in the following table. For more on the Failing Item column entries, see Table 2. Failing items details, which follows the reference code table below.
Table 1. (573A, 576A) Reference codes
| Reference Code | Description/Action Perform all actions before exchanging Failing Items | Failing Item |
|---|---|---|
| B9B0 | I/O adapter hardware error detected |
Table 2. Failing items details
| Failing Item | Description | Document Description |
|---|---|---|
| AJDG301 | Licensed Internal Code | See the service documentation for instructions. |
| IOA | Communications adapter card | See the service documentation for instructions. |