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<blockquote data-quote="deeptho" data-source="post: 1164211" data-attributes="member: 215446">I did some dish maintenance and discovered my C-band LNB was full of water. After &quot;emptying&quot; it, it no longer worked. So I opened it up and it was damp inside. Also, some white fluid and powder covered the back plate and some of the electronics. The same white deposit was also in the wave guide. I managed to clean it up and let it dry. It seems to work again.What could this deposit&nbsp; be?How would water have entered the LNB? Through the antennas in the waveguide? The entry point looks a tiny bit rusty.What is the best way to clean this? I used a tiny bit of acetonI now made a few changes:<ol>
<li data-xf-list-type="ol">I drilled a hole at the bottom. Next time it rains, at least the water will have some way to exit the wave guide.</li>
<li data-xf-list-type="ol">I now rotated the lnb so that the electronics and cables are above the wave guide (used to be at the bottom as I expected this to shield it a bit more from the rain)</li>
</ol>[ATTACH=full]157155[/ATTACH][ATTACH=full]157156[/ATTACH][ATTACH=full]157155[/ATTACH][ATTACH=full]157156[/ATTACH]</blockquote>

[QUOTE="deeptho, post: 1164211, member: 215446"] I did some dish maintenance and discovered my C-band LNB was full of water. After "emptying" it, it no longer worked. So I opened it up and it was damp inside. Also, some white fluid and powder covered the back plate and some of the electronics. The same white deposit was also in the wave guide. I managed to clean it up and let it dry. It seems to work again. What could this deposit be? How would water have entered the LNB? Through the antennas in the waveguide? The entry point looks a tiny bit rusty. What is the best way to clean this? I used a tiny bit of aceton I now made a few changes: [LIST=1] [*]I drilled a hole at the bottom. Next time it rains, at least the water will have some way to exit the wave guide. [*]I now rotated the lnb so that the electronics and cables are above the wave guide (used to be at the bottom as I expected this to shield it a bit more from the rain) [/LIST] [ATTACH type="full"]157155[/ATTACH][ATTACH type="full"]157156[/ATTACH][ATTACH type="full"]157155[/ATTACH][ATTACH type="full"]157156[/ATTACH] [/QUOTE]

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