If your board fails to boot after a hardware change, look for a 3-pin jumper labeled or CLRDS . Normal Mode: Jumper covers pins 1-2.

If you can confirm the (e.g., D945GCLF, D915GAG), I can refine this write‑up exactly to that manual.

Since "21 B6 E1 E2" is not a specific model, you must find the actual board name (e.g., , DH67BL , or DZ68BC ) printed directly on the PCB, usually between the PCI slots or near the RAM, to find the correct manual.

Common matches include the DH61BE , DH61CR , or DH61WW . 3. Quick Reference for Manual Tasks

The Intel manual includes a specific pinout for the (9 pins, row of 5 + row of 4):

Intel Desktop Board 21 B6 E1 E2 Manual 【TRENDING · 2026】

If your board fails to boot after a hardware change, look for a 3-pin jumper labeled or CLRDS . Normal Mode: Jumper covers pins 1-2.

If you can confirm the (e.g., D945GCLF, D915GAG), I can refine this write‑up exactly to that manual.

Since "21 B6 E1 E2" is not a specific model, you must find the actual board name (e.g., , DH67BL , or DZ68BC ) printed directly on the PCB, usually between the PCI slots or near the RAM, to find the correct manual.

Common matches include the DH61BE , DH61CR , or DH61WW . 3. Quick Reference for Manual Tasks

The Intel manual includes a specific pinout for the (9 pins, row of 5 + row of 4):

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