http://community.acer.com/t5/Chromebook/C720-electrical-whine-from-USB-Card-Reader-Board/m-p/236182#M772 <P><SPAN>I have purchased two C720 Chromebooks and both emitted a high-pitched electrical whine, a problem that many have reported on, for instance, Reddit and Chromebook Google Forums.</SPAN></P><P><SPAN>&nbsp;</SPAN></P><P><SPAN>After tearing down one of them today--voiding the warrantly--I determined that a substantial amount of the high-pitched whine was coming from the USB Card Reader Board on the right side of the machine. After I disconnected the card much of the high-pitched whine disappeared. Newegg sells replacements for $15 (</SPAN><A target="_blank" href="http://bit.ly/1evcswR">http://bit.ly/1evcswR</A><SPAN>), though who knows if a new one will be any better. I'm still getting a (quieter) high-pitched whine from the left side, where the other ports are, though they are part of the motherboard, so I don't know what the solution would be.</SPAN></P><P><SPAN>&nbsp;</SPAN></P><P><SPAN>All in all, I really like the C720, even with the persistent squeaky noise, though that has a lot to do with its low cost.</SPAN></P> Fri, 11 Apr 2014 02:49:01 GMT ffsam 2014-04-11T02:49:01Z http://community.acer.com/t5/Chromebook/C720-electrical-whine-from-USB-Card-Reader-Board/m-p/236182#M772 <P><SPAN>I have purchased two C720 Chromebooks and both emitted a high-pitched electrical whine, a problem that many have reported on, for instance, Reddit and Chromebook Google Forums.</SPAN></P><P><SPAN>&nbsp;</SPAN></P><P><SPAN>After tearing down one of them today--voiding the warrantly--I determined that a substantial amount of the high-pitched whine was coming from the USB Card Reader Board on the right side of the machine. After I disconnected the card much of the high-pitched whine disappeared. Newegg sells replacements for $15 (</SPAN><A target="_blank" href="http://bit.ly/1evcswR">http://bit.ly/1evcswR</A><SPAN>), though who knows if a new one will be any better. I'm still getting a (quieter) high-pitched whine from the left side, where the other ports are, though they are part of the motherboard, so I don't know what the solution would be.</SPAN></P><P><SPAN>&nbsp;</SPAN></P><P><SPAN>All in all, I really like the C720, even with the persistent squeaky noise, though that has a lot to do with its low cost.</SPAN></P> Fri, 11 Apr 2014 02:49:01 GMT http://community.acer.com/t5/Chromebook/C720-electrical-whine-from-USB-Card-Reader-Board/m-p/236182#M772 ffsam 2014-04-11T02:49:01Z