---
title: "Arduino UNO SMD Amnesia"
description: "On the Janurary 15, 2011 edition of (https://blog.adafruit.com \"Adafruit Blog\") \" (http://www.adafruit.com/ask \"Ada fruit's Ask an Engineer\")\" live video chat, I heard LadyAda…"
canonical: "https://www.baldengineer.com/arduino-uno-smd-amnesia.html"
author: "James Lewis"
date: "2011-01-20T16:10:22Z"
lastmod: "2015-03-24T16:10:06Z"
image: "https://www.baldengineer.com/wp-content/uploads/2011/01/MRI_head_side1.png"
categories: ["arduino","blog"]
tags: ["arduino-stuff","open-source-hardware","smd","uno"]
---

# Arduino UNO SMD Amnesia


On the Janurary 15, 2011 edition of [Adafruit's](https://blog.adafruit.com "Adafruit Blog") "[Ask An Engineer](http://www.adafruit.com/ask "Ada fruit's Ask an Engineer")" live video chat, I heard LadyAda mention something about "Arduino Amnesia."  After investing the situation a little further, it turns out there are some [Issues with the new Arduino UNO Smd edition](http://blog.arduino.cc/2011/01/20/issues-with-the-new-arduino-uno-smd-edition/ "First report of Uno losing its memory").

A bug in the new bootloader can be triggered on power-cycle causing the SMD version of the board to not load the previously stored sketch.  The good news is there is already a fix for the bug.  Either return the board to your [Official Distributor](http://arduino.cc/en/main/buy "Official Arduino Distributors") or use a ISP to program the [new bootloader](https://github.com/arduino/Arduino/raw/master/hardware/arduino/bootloaders/optiboot/optiboot_atmega328.hex).

Issues (if I could even use that word) like this makes Open Source Hardware fun!