the LAN8742 driver PHY ethernet IC don't output voltage on LEDS pins (PIN2,PIN3)

[Abdulrhman Battikh]

I have a custom board ,I use ethernet protocol, the LAN8742 driver PHY ethernet IC don't output voltage on LEDS pins (PIN2,PIN3) when I connect a network cable between PC and my custom board, but when I connect a network cable between PC and Nucleo Board the IC outputs voltage, I use same IC that is found in Nucleo Board on my custom board, what is the reason?