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Maximus Xi extreme no keyboard detected at bios

carman1tr
Level 7
Hello,
I use two keyboards. One is Apple magic wired and second is Logitech G19s. My problem is, when i connect my usb devices on the back side of motherboard; the system show"no keyboard detected" at bios. But it continue and boot windows. When windows boot, the keyboard works. If i disconnect all the usb devices, the keyboard works even at bios and i can use bios. And sometimes the USB devices stop working or restart itself (corsair icue connected fans, water cooler, etc) when I try to use another keyboard like my old A4 tech or a HP keyboard, the system run without problem. But my Logitech is old and I used it with no problem on my old motherboards.

I tried to update bios, reset it, change settings but not worked. I sent the moterboard to service but they said the keyboard works. The fact is the keyboard works but if i disconnect all the usb devices. I searched on web but i couldnt find any solution.

I use dual boot OS. This makes me choose th OS at boot screen. But because of the keyboard detect problem i cant use dual boot. To use the dual boot option, I have to disconnect my other usb devices to make keyboard work.

This is not a solution. Please help me.*
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