Motherboard · high

How to fixPOST-CODE-A2

POST Code A2 - IDE Detect

What this error means

POST Code A2 - IDE Detect ranks as a high-severity motherboard issue in our database. Motherboard debug code A2 indicates that the BIOS is attempting to detect and initialize SATA/IDE storage drives but has failed or encountered a timeout. Most commonly caused by bad SSD/HDD data cables, dead drive controllers, or loose power connections. This can also stem from corrupted boot partitions or MBR/GPT configurations. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 4 complete
01Check all SATA data and power connection cables

Check all SATA data and power connection cables.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Unplug all storage drives and boot to test BIOS access

Unplug all storage drives and boot to test BIOS access.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Reset BIOS to stock settings using CMOS jumper

Reset BIOS to stock settings using CMOS jumper.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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04Change SATA controller mode to AHCI in BIOS settings

Change SATA controller mode to AHCI in BIOS settings.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Bad or loose SATA data/power connection cables
  • Failing controller chip on SSD/HDD storage drive
  • Corrupted boot partitions or MBR/GPT configurations
  • Incorrect BIOS storage controller settings (legacy IDE mode)