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Z270 Extreme 4 Help RGB PCB components

Johetan
By Johetan
in CPUs, Motherboards, and Memory
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Okay, 

I just tried out the RGB header on the Mainboard - Blue is always on. (it seems to "dim" but not to an 0 state)

Tried Bios "downgrade" no change, installed RGB Software from Asrock, tried the firmware flash. No Change. 

RGB Strip is fine. (tested every channel individually) 

Do any of you have a clue what might be wrong? this sounds like a faulty transistor of some kind. The System per se should not be that difficult. its a controller (which is fine, as all the other LEDS on the board work properly) it has a 12v power source (which is always on) and likely some mosfets which put the pwm signal to good old 12v use. (on GND)

Is there anybody who has a clue which component it might be? :D

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