---
title: "W5500 Not Transmiting on TXN /TXP pins"
url: "https://maker.wiznet.io/forum/14832"
markdown_url: "https://maker.wiznet.io/forum/14832/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "germacovitch"
created: "2023-03-16T00:05:51+09:00"
last_activity: "2023-03-16T07:47:38+09:00"
language: "en"
views: 207
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W5500 Not Transmiting on TXN /TXP pins

## Question

Asked by germacovitch on 2023-03-16 in Ethernet Chips.

Hi
We have a custon board based on W5500. The SPI communication is fine and we can send/recieve spi packets. Howeve, the W5500 is not sending any signal on TXN/TXP pins. Everything looks great.
I could someone give some tips on what could be the cause of these behavior? It seems the aanalog part of W5500 is dead.
BR
Gilberto

## Replies

### Reply 1 by Eugeny, 2023-03-16

AVDD problem. PHY is down. Shortage between TX pins.

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Source: https://maker.wiznet.io/forum/14832