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 Reply to Jaace Best solution Jaace August 20, 2013 12:23:44 PM Share Figured it out... I was using the HDMI port on the mobo instead of the connected video card... duh! Reply to Jaace Ask the community Post an answer Related resources : ForumP9X79 PRO LGA 2011 motherboard, [BOOT_DEVICE_LED LIGHTS UP], WILL NOT BOOT INTO BIOS, ONLY STAYS AT POST ForumAsus Z87-Pro; new build, fails POST; Bios beeps and Boot Device LED got me down ForumSolvedAsus Z87 Deluxe boot device LED lit and no video output ForumAsus Gryphon Z87 Boot_Device_LED Question ForumASUS Sabertooth Z87 Post State LEDs light up on PC start-up ForumAsus Sabertooth Z77 not posting-boot device led ForumZ87 Gryphon will not boot up, displaying BOOT DEVICE LED 'red'. ForumSolvedAsus Z87 LED Lights on boot ForumSolvedAsus Z87 Pro - No Beep, No LED's, No POST ForumAsus P8Z77-V Pro (BOOT_DEVICE_LED) ForumASUS Z87 PRO Motherboard VGA LED on, no POST Forumasus intel p8p67 pro rev 3.1 - solid red VGA led and boot device led ForumNew Build Asus Z87 sabertooth not booting, cpu, ram, gpu led lights continuous flash ForumASUS P8Z77-V Pro Boot Device LED and Beep Codes? ForumAsus m5a97 pro boot device led stays on ForumPC doesn't boot. Asus P8Z77-V-Pro. No BIOS, Boot_device_LED stays red. ForumBRAND NEW Asus Sabertooth x79 - bios does not see DVD room, everything else is fine, (Boot Device LED , red light) ForumAsus P8Z68-V PRO/GEN3 boot_device_led ForumSolvedAsus Z87 Pro - Cpu Red Led ForumSolvedAsus Z87 Pro Mobo shows Q-Code A0 and Power LED glows RED More resources Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !