Lenovo ThinkCentre M91p (English) User Guide - Page 26
Locating parts on the system board
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Locating parts on the system board Figure 4 "System board parts locations" on page 12 shows the locations of the parts on the system board. Figure 4. System board parts locations 1 4-pin power connector 2 Microprocessor 3 Microprocessor fan connector 4 Memory slot 1 (DIMM1) 5 Memory slot 2 (DIMM2) 6 Memory slot 3 (DIMM3) 7 Memory slot 4 (DIMM4) 8 Thermal sensor connector 15 eSATA connector 16 Power fan connector 17 Front panel connector (for connecting power switch and LED indicators) 18 Front USB connector 1 (for connecting USB port 1and 2 on the front bezel) 19 Front USB connector 2 (for connecting additional USB devices) 20 Serial (COM2) connector 21 Internal speaker connector 22 Front audio connector 9 24-pin power connector 23 PCI card slots (2) 10 Battery 24 PCI Express x1 card slot 11 Clear CMOS (Complementary Metal Oxide Semiconductor) /Recovery jumper 25 PCI Express x16 graphics card slot 12 Parallel connector 26 System fan connector 13 SATA connectors 1 and 2 (SATA 3.0 connectors) 27 Cover presence switch connector (Intrusion switch connector) 14 SATA connector 3 (SATA 2.0 connector) 28 PS/2 keyboard and mouse connector 12 ThinkCentre User Guide