| Code | Meaning (from Intel POST Code Reference) | |------|--------------------------------------------| | | Processor internal test – starting CPU initialization. If stuck, indicates CPU or power issue. | | 21 | OEM memory detection / initial memory sizing. Very common early step. | | b6 | Not standard Intel. Likely a vendor-specific or misread code. In AMI BIOS (used on some Intel boards), b6 is “Clean-up of NVRAM.” | | e1 | Not standard. Possibly “E1” meaning “Runtime APIC initialization” or in some boards, “Error in SMM (System Management Mode).” | | e2 | Could be “E2” – “Initialize multi-processor AP” or in some cases “Invalid password” (rare). | | er | Most likely an error display on a 2-character debug LED – meaning “ER” = General Error / Halt. Could be “E2” misread as “Er.” |
Dual-channel DIMM slots positioned directly to the right of the CPU socket to reduce trace lengths and data latency. intel desktop board 01 21 b6 e1 e2 er
These boards were frequently used in OEM business desktops (like those from Dell, HP, or Lenovo) or sold as standard Intel-branded desktop boards for industrial and commercial office use. Key Specifications | Code | Meaning (from Intel POST Code