Solved ASUS z87 pro boot_device_led lighting up -- not POSTing Tags: Devices LED Monitor Motherboards Last response: August 20, 2013 12:23 PM in Motherboards Share Jaace August 20, 2013 12:15:01 PM I'm building my computer for the first time and have it on a workbench to check that everything is ok. I hooked up my CPU, RAM, GPU and PSU (of course) along with just a keyboard with USB. The fans spin up and the LEDs flash around the board but then it stops and stays red on BOOT_DEVICE_LED with a q-code of 99. I'm not sure what to do at this point...anyone have any suggestions? Let me know if I need to post more info. Thanks! More about : asus z87 pro boot device led lighting posting Best solution Jaace August 20, 2013 12:23:44 PM Figured it out... I was using the HDMI port on the mobo instead of the connected video card... duh! Share Can't find your answer ? Ask ! Publish Related resources P9X79 PRO LGA 2011 motherboard, [BOOT_DEVICE_LED LIGHTS UP], WILL NOT BOOT INTO BIOS, ONLY STAYS AT POST Forum SolvedAsus Z87-Pro; new build, fails POST; Bios beeps and Boot Device LED got me down Forum SolvedAsus Z87 Deluxe boot device LED lit and no video output Forum Asus Gryphon Z87 Boot_Device_LED Question Forum ASUS Sabertooth Z87 Post State LEDs light up on PC start-up Forum Asus Sabertooth Z77 not posting-boot device led Forum Z87 Gryphon will not boot up, displaying BOOT DEVICE LED 'red'. Forum SolvedAsus Z87 LED Lights on boot Forum SolvedAsus Z87 Pro - No Beep, No LED's, No POST Forum SolvedASUS MAXIMUS VI CPU_LED light on whenever I boot up. Forum Asus P8Z77-V Pro (BOOT_DEVICE_LED) Forum ASUS Z87 PRO Motherboard VGA LED on, no POST Forum asus intel p8p67 pro rev 3.1 - solid red VGA led and boot device led Forum ASUS P8Z77-V Pro Boot Device LED and Beep Codes? Forum New Build Asus Z87 sabertooth not booting, cpu, ram, gpu led lights continuous flash Forum Asus m5a97 pro boot device led stays on Forum PC doesn't boot. Asus P8Z77-V-Pro. No BIOS, Boot_device_LED stays red. Forum BRAND NEW Asus Sabertooth x79 - bios does not see DVD room, everything else is fine, (Boot Device LED , red light) Forum Asus P8Z68-V PRO/GEN3 boot_device_led Forum Solvedasus gryphon z87 CPU LED red boot fail Forum More resources Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !