Component Involved:
| 1 | Network IC (REALTEC) |
| 2 | Network Crystal |
| 3 | Resistance |
| 4 | Network Adaptor Transformer |
Changing step:
For the TCP/IP connection issue, replace the Network IC (1) at priority; follow by Network Crystal (2), and Resistance (3).
If the mentioned component replaced but the connection still not working, change new Network Adaptor Transformer (4).
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| Core Board : Rear View |
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| MCU : Front View |