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My Custom PC is Not Posting

When a PC fails to post (Power-On Self-Test), it can be due to various reasons. Here are some steps you can take to troubleshoot the issue:

Basic Checks:

  1. Ensure power is connected and switched on: This seems obvious, but double-check that the power supply is plugged in and switched on both at the wall and on the power supply itself. Also, verify that all internal components are properly connected to the power supply using the correct cables.
  2. Monitor and cables: Make sure your monitor is turned on and plugged into the correct output of your graphics card (or motherboard if using integrated graphics). Try a different cable and/or a different monitor to rule out these components as the culprit.
  3. Clear CMOS: This will reset your BIOS settings to defaults, which can sometimes resolve issues caused by incorrect configurations. Refer to your motherboard manual for instructions on how to clear CMOS.

Component Checks:

  1. RAM: Reseat your RAM sticks, ensuring they are firmly seated in the correct slots according to your motherboard manual. Try booting with only one RAM stick at a time, swapping sticks and slots to see if the issue persists. Consider testing with known-good RAM if possible.
  2. CPU: Re-check if the CPU is properly installed and seated in the socket, with no bent pins. Ensure the thermal paste is applied correctly.
  3. Graphics Card: If you have a dedicated graphics card, reseat it and ensure all power connectors are properly plugged in. If your CPU has integrated graphics, try booting without the dedicated card first.
  4. Connections: Double-check that all other cables are securely connected, including the front panel header, storage drives, and any additional peripherals.

Advanced Troubleshooting:

  • Identify any error codes or beeps: Some motherboards display error codes or emit beep sequences during POST that can provide clues to the problem. Consult your motherboard manual for their meaning.
  • Check compatibility: Ensure all your components are compatible with each other. Use PCPartPicker or similar tools to verify compatibility.
  • Update BIOS: Outdated BIOS firmware can sometimes cause POST issues. Check your motherboard manufacturer’s website for the latest BIOS update and flash it if necessary. (Proceed with caution as this can be risky if done incorrectly)

Additional Resources:

  • Motherboard Manual: This is your key resource for troubleshooting specific to your motherboard and its features.
  • Online Forums and Communities: Seek help from online communities like Reddit’s r/buildapc or tech support forums. Provide detailed information about your system and the troubleshooting steps you’ve already taken.

Remember, troubleshooting can be a process of elimination. Start with the basic checks, then move on to more advanced steps as needed. If you’re not comfortable troubleshooting yourself, consider seeking professional help from a computer technician.

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