---
title: "WIZ107SR dies"
url: "https://maker.wiznet.io/forum/11691"
markdown_url: "https://maker.wiznet.io/forum/11691/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "avi"
created: "2016-02-24T07:09:01+09:00"
last_activity: "2017-05-04T08:39:29+09:00"
language: "en"
views: 829
replies: 5
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# WIZ107SR dies

## Question

Asked by avi on 2016-02-24 in Serial-to-Ethernet & ConfigTool.

Hello,

We ordered 3 modules for evaluation.
At the first day the first one dies (we can’t locate it via the configuration tool).
Another went of off a day after so we are with 66% broken in less than 2 days.

1. What could cause this behavior/ how can we prevent it?

2. We get the “INPUT FIRST MAC?”
   Using the steps in this thread [[Problem with Wiz107SR: not found by configuration tool after firmware upgrade](http://forum.wiznet.io/t/problem-with-wiz107sr-not-found-by-configuration-tool-after-firmware-upgrade/2252/1)] didn’t work.
   How can we fix this?

## Replies

### Reply 1 by Edward, 2016-02-25

Hi…

I have a question.

You do it new Software update??

Thank you

### Reply 2 by avi, 2016-03-01

No we have not yet managed to updated to latest.
The hardware is with version: 4.04

Can this issue be fixed?
What can cause it?

Since we don’t know what causing it we are kind of afraid of using the configuration tool.

### Reply 3 by avi, 2016-03-02

Hello,

Could someone from the wiznet tec team could clear if the config tool can cause this situation?
Devcie: WIZ107SR
HW version: 1.04
Firmware version: 4.04
Config tool version: 1.4.4.1
At all the times that devices stop responding was after clicking on the configuration tool setting bottom.

Please advice.

Regards.

### Reply 4 by jessicapatel123, 2016-12-12

hello
i’m new user.same problem with me that No we have not yet managed to updated to latest.
The hardware is with version: 4.04

Can this issue be fixed?
What can cause it?

Since we don’t know what causing it we are kind of afraid of using the configuration tool.

regards
jessica patel

### Reply 5 by Edward, 2016-12-20

Hi.

Real sorry later answer…

I recommand update firmware version 4.06.

And you try…

If you can not working, retry contact me please.

Thank you

---

Source: https://maker.wiznet.io/forum/11691