c. If your problem cannot be solved after following steps a~b, please try another Graphics card. My friends HP Pavilion computer wouldn't power on. The HDD doesn't have any unusual noises (clicking, voice coil dead, etc.). On rare occasions, you might even have motherboard issues with a new PC — these include random reboots, refusing to boot up, and continual crashes citing … So, you should check if your problem resolves with the battery removal. Unplug the big black power cable from the back of the computer. The green light is on, there's no "yellowish" light of death, and the HDD access light will blink once at boot, then stays off. Check for any dirt on the PCI-E Pin of motherboard or Graphics card Pin as shown in the below image. At first, the aforementioned flashing light on my motherboard would only stay lit for only a couple of seconds (no flashing). She would press the power button, but the computer wouldn't start up. Then try to boot your PC without the battery. D. BOOT LED light is always ON after power on [indicates no boot device(etc:HDD/SSD) or boot device faulty]: I've done the fan test on the PSU. RE: XPS 8300 power light green but will not boot, amber motherboard light tekin112000 A blinking amber power light usually indicates either a motherboard, or a power supply issue, as a power supply costs less, than a motherboard, best to install a 'known' working PSU. This morning I woke up to find my PC won't boot, and I can't enter bios either. The CPU socket and motherboard socket have to match so double check that. What To Do If Your Computer Won’t Boot After A Power Outage. After reading the trouble shooting guide I think that maybe the motherboard is shorted somewhere, because the BOOT_DEVICE_LED is lit up but nothing is turning on. First, try turning on your computer: if the ‘green’ light comes on and you can hear the fan, but nothing happens—it’s a sign your computer has been affected by a power surge or outage. If so, please clean it and try again. I took this as a sign to replace the PSU and when I did, the same green light starts flashing. Motherboard LED lights up but will not boot by ... still no life from anything but the green LED. Some users reported that the faulty battery was causing their computer won’t boot past BIOS. If the new case came with all the "braids" for connecting cables then you should start by making double sure everything is plugged into the right slot with the exact compatibility. The green light probably means that just the motherboard is powered. b. Any suggestions? Locate the battery on your motherboard and remove it carefully. I just built a computer and after turning it on a few times (each time for around a minute), the computer would not boot up anymore. Since I can't even get into Safe Mode, does this mean it's motherboard or power supply? Motherboard's green light is on, but computer won't boot! By the title of this thread I meant that it doesn't turn on, let alone POST. Just because the green light on the motherboard lights up, or the NIC lights up does not mean that the power supply is good (or the NIC if that is what you are troubleshooting). Well, the motherboard does not turn on at all.