Lenovo H420 Lenovo H4 Series Hardware Replacement Guide V1.0 - Page 14

Replacing hardware

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Chapter Replacing hardware Attention: Do not remove the computer cover or attempt any repair before reading the "Important safety information" in the Safety and Warranty Guide that was included with your computer or in the Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Safety and Warranty Guide or HMM, go to the Support Web site at http://consumersupport.lenovo.com Note: Use only parts provided by Lenovo. Removing the computer cover Important Turn off the computer and wait three to five minutes to let it cool down before removing the cover. To remove the computer cover: 1. Remove any media (disks, CDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. 2. Unplug all power cords from electrical outlets. 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. Refer to "Locating connectors on the rear of the computer". 4. Remove the two screws that secure the computer cover at the rear of the chassis. Hardware Replacement Guide 11 31045292_H4_HRG_EN_V1.0.indd 11 2010.9.19 11:11:15 AM

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±±
Hardware Replacement Guide
Attention:
Do not remove the computer cover or attempt any repair before reading the
“Important safety information” in the
Safety and Warranty Guide
that was
included with your computer or in the
Hardware Maintenance Manual
(HMM)
for the computer. To obtain copies of the
Safety and Warranty Guide
or
HMM
, go to the Support Web site at http://consumersupport.lenovo.com
Note:
Use only parts provided by Lenovo.
Removing the computer cover
Important
Turn off the computer and wait three to five minutes to let it cool down
before removing the cover.
To remove the computer cover:
1. Remove any media (disks, CDs, or memory cards) from the drives, shut down
the operating system, and turn off the computer and all attached devices.
2. Unplug all power cords from electrical outlets.
3. Disconnect all cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer. Refer to “Locating connectors on the rear of the computer”.
4.
Remove the two screws that secure the computer cover at the rear of the
chassis.
Replacing hardware
Chapter
31045292_H4_HRG_EN_V1.0.indd
11
2010.9.19
11:11:15 AM