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<blockquote data-quote="pigoo3" data-source="post: 1834312" data-attributes="member: 56379">As to point #1 (corrosion):&nbsp; The corrosion won't really spread.&nbsp; It's not like rust on an automobile that spreads.&nbsp; Automobiles are constantly bombarded with water, salt, and other fluids that continuously &quot;feed&quot; the corrosion process (once bare metal is exposed to the elements).&nbsp; The logic board is primarily made of fiberglass &amp; the connection pathways are usually copper.&nbsp; There really isn't a lot of material there to corrode...and...the corrosion process is not being &quot;fed&quot; by a constant supply of liquid (like water) and salts.As to point #2 (get the non-working USB ports working).&nbsp; Sure this is a great reason...but is it worth $1000 CDN after you've been using it this way for 11 months.If this independent repair shop can clean things for a fair price...not do more harm than good in the process...and this will make you feel better...then go for it.&nbsp; $1000 CDN for a replacement logic board to get the non-working USB ports operational doesn't seem worth it to me (especially after it's been used this way for 11 months).If this were my computer (which of course it isn't)<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" />...I would just let things be (unless by some miracle you can convince Apple to replace the logic board for free...or possibly negotiate a greatly reduced cost).&nbsp; With the years of experience I've had with this exact situation...when the Apple techs see tripped moisture sensors...they're going to say &quot;replacement logic board&quot;...and you pay the full cost.- Nick</blockquote>

[QUOTE="pigoo3, post: 1834312, member: 56379"] As to point #1 (corrosion): The corrosion won't really spread. It's not like rust on an automobile that spreads. Automobiles are constantly bombarded with water, salt, and other fluids that continuously "feed" the corrosion process (once bare metal is exposed to the elements). The logic board is primarily made of fiberglass & the connection pathways are usually copper. There really isn't a lot of material there to corrode...and...the corrosion process is not being "fed" by a constant supply of liquid (like water) and salts. As to point #2 (get the non-working USB ports working). Sure this is a great reason...but is it worth $1000 CDN after you've been using it this way for 11 months. If this independent repair shop can clean things for a fair price...not do more harm than good in the process...and this will make you feel better...then go for it. $1000 CDN for a replacement logic board to get the non-working USB ports operational doesn't seem worth it to me (especially after it's been used this way for 11 months). If this were my computer (which of course it isn't);)...I would just let things be (unless by some miracle you can convince Apple to replace the logic board for free...or possibly negotiate a greatly reduced cost). With the years of experience I've had with this exact situation...when the Apple techs see tripped moisture sensors...they're going to say "replacement logic board"...and you pay the full cost. - Nick [/QUOTE]

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