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        <title>Bootloader damaged without hardware damage</title>
        <description> Hey,

I fried myself an Arduino today. I was measuring out the pots on one of the Polulos and then somehow *zapp* and smoke, PC shuts down and now the board is still recognized over the USB but isnt able to receive firmware. 

I already ordered a new one and its not the first time that happened to me so now that I can use the new Arduino as ISP I could try to talk to the old one, since its recognized.

So my question is if there is a scenario where the hardware is technically still intact and just the bootloader is fried/ a flash of the whole Arduiono could revive the board. I can imagine various degrees of &quot;short out&quot; with the boards and of course depends on what got shorted to what so I wonder if its possible that a short can only ruin the bootloader/chip firmware and not the hardware. Or is a short of always connected to physical damage?

Cheers</description>
        <link>https://reprap.org/forum/read.php?13,417083,417083#msg-417083</link>
        <lastBuildDate>Wed, 15 Jul 2026 09:13:41 -0400</lastBuildDate>
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        <item>
            <guid>https://reprap.org/forum/read.php?13,417083,421042#msg-421042</guid>
            <title>Re: Bootloader damaged without hardware damage</title>
            <link>https://reprap.org/forum/read.php?13,417083,421042#msg-421042</link>
            <description><![CDATA[ Make sure your brown out detector is set to at least 2.7 V, better 4.3 V. Without BOD, ATmegas tend to corrupt their brain at power loss.]]></description>
            <dc:creator>Traumflug</dc:creator>
            <category>Controllers</category>
            <pubDate>Sat, 18 Oct 2014 06:22:39 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?13,417083,420808#msg-420808</guid>
            <title>Re: Bootloader damaged without hardware damage</title>
            <link>https://reprap.org/forum/read.php?13,417083,420808#msg-420808</link>
            <description><![CDATA[ I'm not sure exactly what went wrong with it, but my Ultimaker 1.5.7 board killed a mega and I was able to revive it by using an UNO I had laying around as an ISP and reflashing the bootloader. . . .<br />
<br />
I followed these excellent instruction:<br />
[<a href="http://www.gammon.com.au/forum/?id=11635" target="_blank"  rel="nofollow">www.gammon.com.au</a>]]]></description>
            <dc:creator>czucker0</dc:creator>
            <category>Controllers</category>
            <pubDate>Fri, 17 Oct 2014 12:12:47 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?13,417083,417194#msg-417194</guid>
            <title>Re: Bootloader damaged without hardware damage</title>
            <link>https://reprap.org/forum/read.php?13,417083,417194#msg-417194</link>
            <description><![CDATA[ Alright, thought so. Ill use this oppotunity to improve my SMD soldering skills]]></description>
            <dc:creator>sungod3k</dc:creator>
            <category>Controllers</category>
            <pubDate>Thu, 09 Oct 2014 07:50:14 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?13,417083,417093#msg-417093</guid>
            <title>Re: Bootloader damaged without hardware damage</title>
            <link>https://reprap.org/forum/read.php?13,417083,417093#msg-417093</link>
            <description><![CDATA[ Most boards (apart from those based on AT90USB1286) have separate chips for the usb to serial converter...<br />
<br />
The converter is still alive, the board is recognized. But the main chip is probably very dead, it had the boot loader on it.<br />
 <br />
It would be very very ....   very rare for a short to only ruin the bootloader, or in fact damage the boot loader.]]></description>
            <dc:creator>Dust</dc:creator>
            <category>Controllers</category>
            <pubDate>Thu, 09 Oct 2014 03:39:12 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?13,417083,417083#msg-417083</guid>
            <title>Bootloader damaged without hardware damage</title>
            <link>https://reprap.org/forum/read.php?13,417083,417083#msg-417083</link>
            <description><![CDATA[ Hey,<br />
<br />
I fried myself an Arduino today. I was measuring out the pots on one of the Polulos and then somehow *zapp* and smoke, PC shuts down and now the board is still recognized over the USB but isnt able to receive firmware. <br />
<br />
I already ordered a new one and its not the first time that happened to me so now that I can use the new Arduino as ISP I could try to talk to the old one, since its recognized.<br />
<br />
So my question is if there is a scenario where the hardware is technically still intact and just the bootloader is fried/ a flash of the whole Arduiono could revive the board. I can imagine various degrees of "short out" with the boards and of course depends on what got shorted to what so I wonder if its possible that a short can only ruin the bootloader/chip firmware and not the hardware. Or is a short of always connected to physical damage?<br />
<br />
Cheers]]></description>
            <dc:creator>sungod3k</dc:creator>
            <category>Controllers</category>
            <pubDate>Thu, 09 Oct 2014 02:53:18 -0400</pubDate>
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