I have set the motherboard LEDs and RGB LED headers to static red in Aura and when the system is powered up everything is working correctly. Some case fans turned on, the cooler pump was on, and the mobo seemed on. It was displaying the debugger light for the CPU. I then popped one of … Replace your power supply immediately if it fails any test you perform. This is the second time I've put together the build and it has the same problem, the first time I sent the motherboard back, they sent an email back saying it was faulty within warranty. Hello, I wonder if anyone has any ideas as i'm running out of things to try. If your PC won’t turn on but motherboard light is on, a potential culprit is the power button on the case itself or the wires connecting that button to the motherboard. The only difference is that when I press the power button on my computer - the power LED lights for a split second, and the CPU cooler fan spins for a half spin. ... hit the power button.... and no post. However when the system goes into shutdown the headers turn off but the motherboard LEDs go into rainbow cycle mode. This just gets better and better! Just because your computer's fans and lights are working doesn't mean that the power supply is functioning properly. Originally posted by: Boobers Check to see if the power supply died. RGB lights on the motherboard are working but wont turn on. A while ago my pc randomly crashed while I was playing a video game and refused to respond to the power button so I did the PSU test and the PSU was fine so I purchased a new motherboard and recently put it back together but the computer still won't start, the motherboards "sb_pwer" led lights up but when I press the power button nothing happens, I purchased a power … I have power now but my device fails to perform any functions other than turn on the solid green light on the motherboard, I've followed procedures like unplugging the device and holding the power for 10 seconds but they have all failed. I was cleaning my computer up and plugged everything back in before closing the whole case up, I checked if the computer booted and everything was working fine, it all came on and booted to windows. Not all of them do; consult your motherboard manual if you’re unsure or having trouble locating it. The PSU tends to cause more problems than any other hardware and is often the cause of a computer's components to work selectively or intermittently. I am having issues with my motherboard LEDs not turning off when the board system is Shut Down. Disconnect the main PSU connector from the motherboard and use a piece of wire (or a paper clip) to jump the green wire (there is only one) to any of the black wires (they are all connected together inside the PSU). Whenever I press the power button the fans all spin, four lights turn on and stay lit on the motherboard but the PC doesn't actually start. Troubleshooting. When it does boot it runs perfect and stable with good scores. The mobo light … I recently purchased a new system, specs below, which would about 50% of the time not POST or give any display output (fans on/lights on etc). I have switched out the power supply, and … PC build won't power on at all, no lights, no fans. Check to see if your motherboard has an onboard power button. I've got the POST test card now and some of the lights stay lit on it but it doesn't seem to show any codes just four lines in the led display where the codes are meant to be. Power supplies can appear to still be functioning, as the power supply fan may still run, as well as the CPU fan and any lights that you might have on your computer. Hello, My motherboard doesnt seem to power on at all. No fans, no lights, no beeps, no clicks - nothing. I assumed it was the PSU, went out got a new one, put it in, same result. But just because these parts activate, it doesn’t mean the power supply is supplying enough juice to the motherboard … The CPU them do ; motherboard lights on but no power your motherboard has an onboard power button.... and no post the.: Boobers check to motherboard lights on but no power if your motherboard manual if you ’ re unsure or trouble., the cooler pump was on, and the mobo seemed on n't on! Leds not turning off when the board system is Shut Down to power at! 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