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 Asus Z97 - AR boot device led lights up after a sequence of led blinks, no display, no sound 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 SolvedWhat does BOOT_DEVICE_LED on ASUS Z97-A being lit up mean? 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 I have an Asus m99fx pro motherboard.no vga and boot device led Forum Asus P8Z77-V Pro BOOT_DEVICE_LED Red 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 SolvedASUS MAXIMUS VI CPU_LED light on whenever I boot up. Forum ASUS P8Z77-V Pro Boot Device LED and Beep Codes? 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 More resources Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !