Lenovo 10152/F0AG, Руководство по техническому обслуживанию аппаратной части

Страница: 86 / 118

8. Lift the failing heat sink assembly off the system board.
Notes:
a. You might have to gently twist the heat sink assembly to free it from the microprocessor.
b. Do not touch the thermal grease while handling the heat sink assembly.
9. To reinstall the heat sink assembly, position the new heat sink assembly on the system board so that the
ve screws are aligned with the corresponding holes in the system board and computer main bracket.
10. Follow the sequence
1
,
2
,
3
,
4
on the heat sink assembly to tighten the four screws and install the
screw
5
to secure the heat sink assembly to the system board, as shown in Figure 20 Loosing the
screws that secure the heat sink assembly to the system board on page 79.
11. Reinstall the system board shield. See Removing and reinstalling the system board shield on page 76.
12. Go to Completing the parts replacement on page 96.
Replacing the microprocessor
Attention
Do not open your computer or attempt any repair before reading and understanding the Important safety
information in the
Safety, Warranty, and Setup Guide
that came with your computer. To obtain a copy of the
Safety, Warranty, and Setup Guide
, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the microprocessor.
CAUTION:
The heat sink and fan assembly might be very hot. Turn off the computer and wait three to ve
minutes to let the computer cool before removing the computer cover.
To replace the microprocessor, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or other at surface. Hold the sides of your computer and
gently lay it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See Removing the computer cover on page 71.
4. Remove the VESA mount bracket. See Removing and reinstalling the VESA mount bracket on page 71.
5. Locate the microprocessor on the system board. See Locating major FRUs and CRUs on page 63.
6. Remove the system board shield. See Removing and reinstalling the system board shield on page 76.
7. Remove the heat sink assembly to gain access to the microprocessor. See Replacing the heat sink
assembly on page 78.
8. Press the small handle
1
to open the retainer
2
to access the microprocessor
3
.
80
Lenovo S710 All-In-OneHardware Maintenance Manual