Mine started to behave exactly the same today. Keyboard is dead, no reaction to Num/Scroll/Caps (no LED lights). Doesn't matter which USB port keyboard is connected to. Unplugged everything (SSD/HDD/ODD). Cleared CMOS and password (I did not set one), swapped RAM sticks in all variations, checked RAM sticks and keyboard on another PC - they are OK. What does the jumper "FLASH_OVERRIDE" mean?
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