International Business Machines Corporation Desktop 8416

Inspect the lens area for issues

Clean the lens with a cotton swab or Q-tip if smudged

Blow away debris from the lens area if present

Surface Check for Optical Mouse

Is the mouse surface intricate or patterned?

Read 'Important safety information' before proceeding

Has the computer been turned off for a long period of time?

Turn on the computer for a few minutes to soften the thermal grease if necessary

Turn off the computer and disconnect the power cord from the electrical outlet and from the computer

Rotate the drive bay assembly upward to gain access to the system board

Remove the PCI riser card assembly along with any adapters

Read 'Important safety information'

Refer to 'Lithium battery notice' for replacement and disposal information

Turn off the computer and disconnect the power cord from the electrical outlet and from the computer

Locate the battery on the system board

Remove the PCI riser and PCI adapters that impede access to the battery

Read 'Important safety information' before proceeding

Has the computer been turned on recently?

Turn off the computer and disconnect the power cord

Rotate the drive bay assembly upward

Remove the air baffle from the microprocessor heat sink

Loosen the screws on the clamps securing the heat sink

Read 'Important safety information' before proceeding

Ensure all safety guidelines are understood

Disconnect the power cord from the electrical outlet and the computer

Rotate the drive bay assembly upward

Disconnect the fan assembly cable from the system board