The motherboard layout is shown below:
Turn off the system, return the jumper cap to pins , and secure the case cover. 7. Common Troubleshooting Codes
Finding the specific manual for OEM (Original Equipment Manufacturer) boards can be notoriously difficult. These boards were mass-produced for pre-built systems (specifically Lenovo ThinkCentre and IdeaCentre lines) and rarely have a standalone "user manual" like retail motherboards from ASUS or MSI. Lenovo Is6xm Rev 1.0 Motherboard Manual
Close the load plate and secure the lever beneath its retention tab. Troubleshooting & Post-Codes Lenovo IS6XM Motherboard Manual | PDF - Scribd
From the manual: If you are using a standard case, connect the power switch to pins 6 & 8. The reset switch goes to 7 & 9. The motherboard layout is shown below: Turn off
System board timer error or hardware component failure. Strip the board down to only CPU and power to isolate the failure.
CR2032 (3V). Replacement steps: unplug PC, move JP1 to clear, replace battery, restore JP1. The reset switch goes to 7 & 9
Connect the power button switch wire across Pin 5 and Pin 7 . Polarization does not matter for momentary switches.
If you are transplanting this board into a non-Lenovo case: You will likely need to cut the connector block off the case wires and connect them individually using the diagram above. Standard case connectors (GND/PWR) usually work if you trial-and-error the polarity for LEDs.
You can view the technical 65-page document on Scribd or download the official M91p Hardware Guide directly from Lenovo.