<story><title>Macbook Pro frying USB peripherals</title><url>https://discussions.apple.com/thread/8223635</url></story><parent_chain><item><author>bb88</author><text>First thought is that probably a SMD component has shorted itself out.  Unfortunately that&amp;#x27;s default behavior for many SMD components -- short circuit instead of an open circuit.&lt;p&gt;If the power adapter supplies 20V (which sounds like it might), then any components which might have shorted them selves out could be passing 20V to the other usb power line right next to it.&lt;p&gt;The other side of the machine probably has another USB controller, which likely explains why it&amp;#x27;s fine.&lt;p&gt;So, in short, I don&amp;#x27;t think this is a problem with USB-C, just a bad luck of the draw that you got a failed component along the way.&lt;p&gt;Edited to add:&lt;p&gt;Louis Rossmann&amp;#x27;s macbook repair Youtube channel is pretty good at discussing why things fail for a mac.
&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;channel&amp;#x2F;UCl2mFZoRqjw_ELax4Yisf6w&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;channel&amp;#x2F;UCl2mFZoRqjw_ELax4Yisf6w&lt;/a&gt;</text></item></parent_chain><comment><author>_wiv7</author><text>Actually, it&amp;#x27;s not SMD components in particular.  The failure mode for many MOSFETs and other semiconductor devices tends to be a short.  They only tend to fail open if there was enough energy at hand to blow the short clear.</text></comment>
<story><title>Macbook Pro frying USB peripherals</title><url>https://discussions.apple.com/thread/8223635</url></story><parent_chain><item><author>bb88</author><text>First thought is that probably a SMD component has shorted itself out.  Unfortunately that&amp;#x27;s default behavior for many SMD components -- short circuit instead of an open circuit.&lt;p&gt;If the power adapter supplies 20V (which sounds like it might), then any components which might have shorted them selves out could be passing 20V to the other usb power line right next to it.&lt;p&gt;The other side of the machine probably has another USB controller, which likely explains why it&amp;#x27;s fine.&lt;p&gt;So, in short, I don&amp;#x27;t think this is a problem with USB-C, just a bad luck of the draw that you got a failed component along the way.&lt;p&gt;Edited to add:&lt;p&gt;Louis Rossmann&amp;#x27;s macbook repair Youtube channel is pretty good at discussing why things fail for a mac.
&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;channel&amp;#x2F;UCl2mFZoRqjw_ELax4Yisf6w&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;channel&amp;#x2F;UCl2mFZoRqjw_ELax4Yisf6w&lt;/a&gt;</text></item></parent_chain><comment><author>Rebelgecko</author><text>&amp;gt; The other side of the machine probably has another USB controller, which likely explains why it&amp;#x27;s fine.&lt;p&gt;Unfortunately (well, except in this case) that&amp;#x27;s true. On the 13inch MacBooks, the ports on the right side have less bandwidth and can struggle with multiple 4k displays</text></comment>