IBM 8122, 8138, 8131, 8123, 8137, 8124 Locating connectors on the rear of the computer, Locations

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Locating connectors on the rear of the computer

Locating connectors on the rear of the computer

The following illustration shows the location of connectors on the rear of the computer.

1	Power supply diagnostic	11	Ethernet connector
	LEDs
2	Voltage selection switch	12	USB connectors (2)
3	Power connector	13	Standard keyboard connector
4	Audio line in connector	14	Standard mouse connector
5	Audio line out connector	15	PCI Express x16 adapter connector (some
			models)
6	Microphone connector	16	PCI adapter connector
7	Serial connector (COM 1)	17	PCI adapter connector
8	Parallel connector	18	PCI Express x1 adapter connector
9	VGA monitor connector	19	Serial connector (COM 2) (some models)
10	USB connectors (2)

Chapter 1. Locations 3

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Contents ThinkCentre Hardware Replacement Guide Types 8122, 8123 TypesPage ThinkCentre First Edition April Chapter 2. Replacing hardware ContentsOverview Chapter 1. Locationsiv Hardware Replacement Guide Additional information resources Safety information for replacing CRUsSafety information for replacing FRUs OverviewHandling static-sensitive devices Tools requiredLocating components Chapter 1. Locations2 Hardware Replacement Guide Locating controls and connectors on the front of the computerChapter 1. Locations Locating connectors on the rear of the computer4 Hardware Replacement Guide Identifying parts on the system boardRemoving the computer cover Chapter 2. Replacing hardware6 Hardware Replacement Guide Chapter 2. Replacing hardware Pivoting or removing the optional hard disk drive mounting bracketRemoving and replacing the front bezel Replacing the power supply2. To access the 12 V power connector, remove the lower drive cage thumb-screw and slide the lower drive cage toward the rear and out of the bay. Place the drive cage out of your way without disconnecting the drive signal cables Note Use only the screws provided with the new power supply 12. Go to “Completing the installation” on page 9. Reconnect power supply connectors 1 and 2 to the system board10. Reinstall the lower drive cage and secure it with the thumb-screw 11. Reconnect a power supply connector to each of the drivesReplacing the system board assembly 9. Remove screws 1 through 7 14 Hardware Replacement Guide 15. Using the vacuum pen1, remove the microprocessor from the system board socket by lifting it straight up and out of the socket 16 Hardware Replacement Guide 19. Pivot the microprocessor retainer 3 to the closed position and rotate the locking lever 2 to secure the microprocessor 1. Make sure the locking lever is engaged with the retainer tab when securing the microprocessor 22. Align the seven screw holes, and install the screws Replacing the microprocessor 20 Hardware Replacement Guide Chapter 2. Replacing hardware 22 Hardware Replacement Guide Chapter 2. Replacing hardware 24 Hardware Replacement Guide 12. Reinstall the air baffle13. Go to “Completing the installation” on page Replacing a memory module 26 Hardware Replacement Guide Replacing an adapterReplacing the hard disk drive 28 Hardware Replacement Guide Replacing an optical drive7. Reconnect the signal and power cables to the drive 30 Hardware Replacement Guide Replacing the diskette driveReplacing the keyboard Replacing the internal speaker Replacing the mouse32 Hardware Replacement Guide Completing the installation Updating flashing BIOS from a diskette or CD-ROM Page 1P P/N 39J7784 Part Number 39J7784 Printed in USA