Identifying Parts On The System Board; System Board Parts Locations - Lenovo ThinkStation 4155 Hardware Installation And Replacement Manual

Identifying parts on the system board

Figure 4 shows the location of the parts on the system board.
Figure 4. System board parts locations
▌1▐ CPU 1 memory slots (6)
▌2▐ Microprocessor and heat sink 1
▌3▐ CPU 1 fan connector
▌4▐ CPU 1 12 V power connector
▌5▐ CPU 1 memory fan connector
▌6▐ Microprocessor and heat sink 2
▌7▐ CPU 2 12 V power connector
▌8▐ 24-pin power connector
▌9▐ CPU 2 fan connector
▌10▐ CPU 2 memory fan connector
▌11▐ CPU 2 memory slots (6)
▌12▐ Power switch/LEDs connector
▌13▐ Auxiliary LED connector
▌14▐ Hard disk drive fan connector
▌15▐ Diskette drive connector
▌16▐ Card reader connector
▌17▐ Front USB connector
▌18▐ Front IEEE 1394 connector
10
Hardware Installation and Replacement Guide
▌19▐ Hard disk drive connectors (5)
▌20▐ Optical drive connectors (3)
▌21▐ Battery
▌22▐ Clear CMOS/Recovery jumper
▌23▐ Thermal sensor connector
▌24▐ Cover presence switch connector
▌25▐ PS/2 keyboard and mouse connector
▌26▐ Internal speaker connector
▌27▐ COM 2 connector
▌28▐ Front audio connector
▌29▐ PCI adapter card slot
▌30▐
(x16 mechanical)
▌31▐
▌32▐ PCI adapter card slot
▌33▐ PCI Express x16 graphics adapter card slot
▌34▐ PCI Express x1 adapter card slot
▌35▐ Graphic card power connector
▌36▐ Rear fan connector