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Old 07-09-2019, 10:50 AM
c-attack c-attack is offline
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Join Date: Jun 2014
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POST ID # = 1010669
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The fan LEDs are serial, so if LED number #4 on fan 2 has a problem, the show stops there. Standard troubleshooting is to take the lighting wire from fan 2 and swap it with a fan further down the line — like #6. If fans 1-5 are now OK and #6 is erratic, then you likely need a new fan. If things remain exactly the same, then we are likely looking for another cause.
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