When a system successfully boots up and starts loading your Operating System, this means the system was able to fully check the hardware for any issues. This is referred to as the POST (Power on Self Test) and is important to make sure all hardware is seated and working properly.
If your system were to fail the POST process when powering up it can result in the startup process to be paused or cause the system to shut down. Common issues that cause a system to fail the POST include:
- Power issues (bad power outlet or disconnected power supply cables)
- Issues with USB devices and other external connections
- Hardware not seated properly (GPU and RAM)
- Defective Hardware (GPU, CPU, RAM, or Motherboard)
Troubleshooting these issues can be relatively easy and only take a few minutes. If at any point you have questions or run into issues while going through the troubleshooting steps below, please contact our Customer Service Team for a Live Chat or via the Phone by calling toll-free at +1 800 228 9395. Our live services are open from 8 AM to 8 PM PST Monday to Friday.
To begin, please power the PC down and turn the power supply switch to the off position. Next, make sure the system is connected to a power outlet that is known to work and can support the power your system needs. Connect any peripherals, turn the power supply switch to the on position, and power on the system.
If your system still does not POST, remove all peripherals except for your Display and Power cables and attempt to power on the system again. If it does past the POST and you are able to start loading into your PC, one of your peripherals may be defective. Power off the system and connect one peripheral and then power the system on again. Repeat this until you find the peripheral that is causing the issue.
If your system still will not pass the POST, the next step is to verify that all hardware and power cables that are in the system are properly connected/seated. Before you check this, make sure the system is powered off completely and disconnect the power cable.
The first hardware to check is the RAM.
To re-seat the RAM you must first un-clip the RAM from the slot they are in. To do this, you push the clip located at the top of the slot down away from the RAM stick as shown in the image below. Some motherboards have clips at both the top and bottom of the slot.
After fully removing the RAM sticks from their slots, return them to the same slots and make sure that enough pressure is applied to re-engage the clips. You will hear a small click when they are put in correctly.
After re-seating your RAM, plug your PC back in and attempt to boot again. If the POST problem persists, try removing one stick at a time and placing it in every slot, if no luck then try the other. Be sure to turn the computer off and on before and after moving the RAM as described above. If the Motherboard has 4 RAM slots, try re-seating the sticks in the other 2 slots as well. Please note RAM sticks are paired in slots 1 and 3 and 2 and 4 on 4 slot Motherboards. If seated next to each other the RAM may not function properly. If you find a particular combination of the RAM allows your system to start up like normal, contact the customer service team for further assistance.
If your system still fails the POST after re-seating the RAM, the next best step is to re-seat the GPU. Make sure your system is fully powered off and disconnected from a power outlet before doing this. Next, depending on what size GPU you have, there will be two to three screws located to the left of the GPU. These screws hold the card in place. With an appropriately sized screwdriver, remove all screws holding the GPU in your build.
Once the screws are removed you will need to un-clip the GPU from the PCIe slot it's currently occupying. The clip is located where the GPU and the motherboard meet. Depending on what motherboard you have, the clip may slide out of place or will need to be pushed down.
Once this clip is undone, you will need to undo the power supply cables that connect to the GPU. To do this, grip the clip locking the cables to the GPU and pull away from the card. Depending on your GPU this could be one to three connectors.
After removing the cables connected to the GPU, you will be able to remove the card safely. If you have an Intel CPU in your BLD PC, you will need to test the system to see if your PC will complete the POST process without the GPU. In order to do this, plug in the Display Cable from your TV/Monitor to the HDMI/DP port located on your Motherboard. Plug the power supply into a power outlet and then attempt to power on your system. If your system passed the POST and starts loading Windows, please contact the customer service team for further assistance.
If you have an AMD CPU or if your Intel system did not POST, please reverse the steps we just went through and attempt to start up your system. If your PC still fails the POST, then our last step is to verify that all of the power cables from the power supply are connected properly. You will need to disconnect and re-connect the CPU power cable located at the top left of the Motherboard. This can be anywhere from one to two cables depending on what Motherboard you have. Next, disconnect and re-connect the ATX power cable located to the right of your RAM slots.
Attempt to power on your system again. If your system is still not passing the POST we will need to verify that all the power cables are connected on the power supply as well. If you have a non-modular power supply such as the Seasonic S12III 650W Bronze, you will need to contact customer service for further assistance, as these cables are not removable on the power supply.
To check your power supply cables, you will need to open up the right panel of the case. This is the panel on the opposite side of your window. For the H700/H700i cases, there is a small black button located right above your Motherboard USB ports on the back of your case. For all other cases, the right panel is held on by two thumbscrews you can remove either with your hands or a Phillips screwdriver. Once removed, you will find your power supply located at the bottom right corner of the open side of your case.
At this point, you will need to disconnect and re-connect all cables connected to the power supply. Make careful note of where each cable goes. There is handy text written on the cables and power supply that indicate where they are connected, but just in case write them down or take photos to make sure you don't plug one of these cables into the wrong place.
After carefully re-seating all cables to the power supply, attempt to power on your system. If your system still does not pass the POST, then it may need to be sent in for repair. Please reach out to us arrange an RMA. You can also contact our Customer Service Team Live Chat or call us toll-free at +1 800 228 9395 for quicker assistance.