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Old 01-07-2020, 06:20 PM   #6
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Join Date: Oct 2008
Posts: 5,018
I didn't check the exact model of the LED when I fixed 4 keys on my son's G810. I remembered the LED is square type about 4mm x 4mm sit right at the center beneath the RomerG switch.

LED be it single or tri-colour will degrade over time. However, Logitech's SMD LEDs fail rate seem on the higher side compare to other mechanical keyboard using SMD LEDs. There are 2 types of SMD tri-colour LEDs, 1 is common anode and the other common cathode. Not sure which one unless desolder one of them and test it with MM.
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