Here’s a concise write-up regarding the Lenovo IS6XM Rev 1.0 motherboard — based on available technical references and typical Lenovo OEM board documentation.

6. Power Connector Pinout (Proprietary)

Do not connect a standard ATX 24-pin PSU directly – it will damage the board.

| Lenovo 14-pin (PWR1) | Voltage | ATX equivalent | | :--- | :--- | :--- | | Pin 1 | +12V (yellow) | +12V1 | | Pin 2 | +12V (yellow) | +12V2 | | Pin 3 | GND (black) | GND | | Pin 4 | GND (black) | GND | | Pin 5 | +5V (red) | +5V | | Pin 6 | +5V (red) | +5V | | Pin 7 | GND | GND | | Pin 8 | PWR_ON# (green) | PS_ON# | | Pin 9 | +5VSB (purple) | +5VSB | | Pin 10 | +12V sense | N/A | | Pin 11 | GND | GND | | Pin 12 | +3.3V (orange) | +3.3V | | Pin 13 | +3.3V | +3.3V | | Pin 14 | +3.3V sense | N/A |

10-pin AUX connector (PWR2) – Carries additional +12V and GND for CPU.
Use a pre-made "Lenovo 14+10 to ATX 24-pin" adapter (readily available online).

Important Headers (Top-to-bottom, left-to-right)

Jumper Settings:

Part 4: BIOS Guide (As per the Lenovo Manual)

The Lenovo BIOS on the IS6XM is the Phoenix SecureCore Tiano version. Enter BIOS by pressing F1 during POST (not DEL).

Finding the Manual

Lenovo does not always publish separate motherboard manuals for OEM boards. Instead, the motherboard documentation is embedded within the system’s hardware maintenance manual or user guide.

To get the official information:

  1. Go to Lenovo Support → search for your system model (e.g., ThinkCentre M71e).
  2. Download the Hardware Maintenance Manual (HMM) — this contains motherboard layout, jumper settings, CMOS clear procedure, and part numbers.
  3. If you need strictly the motherboard specs, community archives (like ManualsLib or RetroPC forums) may have scanned copies.

Example jumper settings (from HMM):

Known Issues & Tips