Pc won t start when cpu power cable is plugged in. No fan, no light, no beeping.
Pc won t start when cpu power cable is plugged in After a bit of googling I found this supplies the cpu with power. If I unplug the SATA power cable from the SSD and then attempt to boot (even with the SATA data cable plugged in still), the fans spin up normally and the power stays on. Step 1: Inspect the Power Supply. Jul 21, 2023 · I tried testing my all parts one by one and noticed everything was powering if my cpu was not plugged into the psu. also getting standby power from the psu doesn't mean much if its missing 5volt output. I have replaced all cables and PSU to a newly purchased one. it only boots if the power cable for the cpu isnt plugged in. https://ibb. This is the cable for cpu (6+2) but both 2 cable are connected to each other and short. The weird electrical noises is probably because+12V is conducting extreme over-current, also causing Mar 8, 2020 · Make sure you've connected the appropriate CPU (8+4) and GPU (8+6) cables coming off from the PSU. The standby voltage also enables the microcontroller in the Power Supply, hence if standby power circuit on motherboard is shorted then nothing works. Oct 15, 2018 · System Name: Rainbow Sparkles (Power efficient, <350W gaming load) Processor: Ryzen R7 5800x3D (Undervolted, 4. . The most obvious thing would be the power cables are plugged into the wrong spots so I took out the PSU and they are plugged into the SATA & peripheral ports on the PSU. Now if you connect to the wall and it still fails , then you could have a problem with power passing wrong ways , which could be your computer, or even via another computer improperly grounded or some other odd power stuff on the rest of the network. Clean boot! Sep 9, 2016 · Hi everyone, So my computer always performed like a beast (i7 4770k Maximus Hero VI sapphire tri-x 290 8 go GSkill 2400 Mhz PSU XFX 850 pro Modular) until today, everything was running fine then i heard a *Boom*, electricity went out of the sector, i got it back then my computer didnt wanna If I push the power button when everything is connected, it does what's mentioned above. Oct 19, 2023 · When turning on power, both the CPU cooler and the Motherboard LEDs only show red lights. co/r4QRjGp This 8 pin for gpu. I plugged a case fan in the cpu-fan slot and everything was fine again. PC won't boot up. PC won't start. Sometimes a loose connection may prevent the computer from turning on. When I press the power putting on my PC case, it starts the fans and lights, and then about 0. Dec 22, 2010 · The CPU fan turns a tiny bit, but then stops. But obviously i cant boot into windows or bios without a cpu. Jan 1, 2022 · I tested the RAM, GPU, and CPU, but nothing was wrong with these. The moment i unplug the DP Aug 23, 2015 · Jump into the asus bios, disable entirely the nic itself in the bios. Look out for any damaged cables or Jun 22, 2020 · What the OP likely means is when the CPU fan is plugged into the CPU fan port it will not boot; usually the opposite is the problem. other than the odd case of a bad stick ram shorting out cpu power hard to tell what failed. 5sec later, it all shuts off. Jun 9, 2021 · My PC (few months old) suddenly was unable to boot after I forced off it using the wall plug. Turning the PC off and plugging in the 8 pin connectors still makes the PC turn on and off again. I checked the lights on my motherboard and both RAM sticks where being detected but I was getting a CPU failure warning (for obvious reasons) I ordered a new power supply (CORSAIR TX650M) thinking that was the issue but I was Aug 5, 2020 · Power supply if plugged into outlet always has power on +5(standby) routed on motherboard to the "power switch" and to keyboard. The worst thing is, that even the best PCs will have the occasional moment where the CPU Wake up today and find the thing just won't boot. i plug the cable back in and the problem persists. did the power supply fan spinup at all when you jumped the psu? im guessing it did and your just not geting power to cpu for some other reason. That is why your motherboard has a place for 4 and 8 pin atx power. So I decided to try the 2x4 pin cpu cable on the 8pin connector on the board and it had the same problem, that the computer won't start at all. Nothing. Is my motherboard dead? Any chance that my other components are dead too? The computer itself will turn on without the 8 pin cpu power cable plugged, this included all the cpu fan and other fan, i also have it plugged to the gpu and the motherboard is running just fine, even though im not really sure if the vga is powered at all, Apr 11, 2008 · PC won't start up with cpu power connector plugged in! but get the same problem. In most cases, your computer won’t turn on. Sep 2, 2012 · My old mobo now does the same thing, even if the 4pin is not plugged in, so it's not staying on no matter what I try. Specs: Mobo: MSI MPG Z390 Gaming Edge AC CPU: i5-9600kf GPU : MSI GTX 1660 PSU : EVGA 650w Power Supply Apr 16, 2020 · Check this image. 45GHz all core) Motherboard: Asus x570-F (BIOS Modded) Perform Basic Checks. It's 1000w gold, so power isn't the issue and obviously a HDD draws almost nothing. The normal power LED lights up for 2 seconds and goes off for 10 seconds, and repeat. The new one is mostly acting as before, and I tried starting it with the 8pin plugged in, but the CPU not on the MB, and it does the same thing, spinning up fans before dieing. Power Cable or Adapter: Ensure the power cable (desktop) or AC adapter (laptop) is securely connected to both the computer and the power outlet. Jan 9, 2024 · My computer won’t turn on. After further testing I found that the pc won't start up when the atx_v12 port is plugged in. I unplugged the CPU power cord and then it starts, but you can’t do much without that. Apr 16, 2008 · - PC <- cheap cable -> U2717D: The monitor complains "no DP CABLE". Unseat the cooler, remove the CPU from the socket and check for bent pins. Next steps would be to test CPU or Ram, if it is having issues when CPU power is plugged in it is most likely the CPU. When I'm connecting. The OP states "If I unplug the GPU the pc will power up" but we don't know if he had a monitor connected to another graphics port and the BIOS screen appeared, or Dec 30, 2020 · You have many pcie x16 slots and it can take much power to run them all. I then discovered that when the CPU power cable is not plugged in the fans would spin up and the lights would come on. Casing fan runs for 1 second and goes off for 11 seconds, and repeat. Check Power Button: Press the power button firmly. I have disconnected everything and tested the PSU which turns on fine, but when the 4-Pin CPU Power cable is plugged in, the problem still exists. based off peoples experience with this it was either the psu or the mobo. Also check If your PC won’t start when the CPU power cable is plugged in, follow these structured troubleshooting steps to identify and potentially rectify the issue. true. Neither are any of my storage drives. If it doesn’t work properly, your CPU, GPU, RAM, and hard drive can’t communicate. Apr 2, 2017 · When I tried plugging everything into the PSU I was surprised as the computer wouldn't turn on so I unplugged everything and only plugged the 24Pin cable and the CPU cable and the computer would run fine. I got a new mobo x670e taichi. Replace it with a new one if possible. I've unplugged everything and pin point the problem to either the motherboard/CPU. One of them will be plugged only half in to the 4 pin motherboard connector. Nov 26, 2020 · Once I started the computer it refuses to start, I removed the sata power cable and the sata cable, and the pc started to work again, when plugging back in the sata cable to the motherboard the pc worked aswell, but when plugging in the sata power cable to the psu it refuses to work. Initially I thought it was the psu so I swapped it out but that didn't resolve anything. overheating. If I hold down the power button after this, a blue light inside my PC will flash. so i tested the cpu 8 pin power cable by unplugging it and it powers on without any problem. Not the indicator lights on the motherboard though, just all the visuals. Begin by checking the PSU itself: Check Connections: Ensure that the PSU is connected securely to the power outlet. And the 1 long, 4 short beeps it gave was about the cpu fan. CPU fan runs for quarter of a turn, and goes off for 12 seconds, and repeat. Jun 8, 2021 · There's a defect in the CPU/VRM areapossibly a defective motherboard VRM. The system still powers on when I just plug in the ATX power connector. May 7, 2021 · Sata cable is fine, but as soon as power is given to the HDD or SSD it won't turn on. Go to the BIOS or UEFI and check the settings and all its options whether or not these are set as desired. May 20, 2022 · Check for faulty power sources or power cables and even the power buttons that may cause such issues. Use them. Tested with another CPU cooler, in case the current were dead, same response. This cable is working fine. Your psu has two 8 pin eps 12v connectors. Jun 26, 2023 · Of course the BIOS might monitor both EPS connectors and prevent booting with only one cable, in the same way most GPU cards won't start if you fail to connect all the power cables. I went to turn it on after but it only lights up for half a second and doesn’t start. I think it does this to prevent damage. If this is the case, I would check the pins in the Oct 8, 2021 · My first thought is that it's a dead CPU. Any help is better than no SPECS: PSU: Corsair RM650X MOBO: MSI B550 Gaming Plus CPU: Ryzen 5 5600x GPU: GTX 1080 Feb 18, 2021 · My PC randomly shut off a night ago so I gave it a night. No fan, no light, no beeping. Jun 8, 2021 · There's a defect in the CPU/VRM areapossibly a defective motherboard VRM. 65 votes, 37 comments. Did you remove the gpu, ram, cpu fan or anything to reroute the power cables from the psu? If the cpu cooler isn't seeted properly or isn't plugged in, some mobos will prevent booting to save the cpu from. It’s one of the most horrifying sentences a computer lover will ever utter. It might help if you disable the ‘Fast Boot’ option. I don’t know if its either the motherboard or my psu, or just the psu cable for the 8 pin connection. However, if I plug in a 6 pin connector, the PC will boot up but I'm told to plug in all my cables. Feb 15, 2022 · 2-If the battery is removable, remove it and try to turn it one while its charger is plugged in. thats what make me think its a mobo issue and not Mar 22, 2007 · An ATX power Supply which has been in use for quite some time but not as long as 10 years doesn’t have a Mains Switch but switches on the 5 V DC Rail which is always on and there is always power Mar 13, 2022 · The motherboard is the platform that connects all the components in your computer together. Jan 29, 2019 · My suspicions was that it was the psu so i switched it out for a new on and nothing. if it's an amd chipset, there is no onboard graphics, so check the graphics card is seated properly. I did some trouble shooting and figured out that the lights and fans stay on if I turn it on withought the CPU power plugged in. You likely do not need all the power but plug them both in anyway. 3-Check if its charger works fine or not. I then turned off the computer to plug the graphics cards into the PSU and when i turned it on again, everthing worked fine. When I do that, everything turns on, but it doesn’t boot into BIOS. qdpiuwluzaaopolnmddbbfhctqhgwmknyufyvflazeulprgjdsttnkgimtrwsziulvoiaxnnt