Small Form Factor (SFF) or custom Micro-ATX designed for Lenovo chassis. Socket Type:
: Unplug the power cord entirely before touching internal components to prevent electrical shock or damage. ib250mh motherboard manual
: Custom Micro-ATX (specifically designed for Lenovo chassis). Power Connectivity : Uses a non-standard mini 10-pin mini 8-pin Small Form Factor (SFF) or custom Micro-ATX designed
Specific pinouts for front panel headers, fans, and power delivery. ib250mh motherboard manual
He kept the motherboard.