Installing Or Replacing A Memory Module - Lenovo ThinkStation Hardware Maintenance Manual
Machine types: 4105, 4157 and 4217, 4155, 4158 and 4218
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10. Install and tighten the two screws that secure the power supply to the inside
11. Reconnect all power supply cables to the drives, adapter cards, and the system
12. Go to "Completing the FRU replacement" on page 131.
Installing or replacing a memory module
CAUTION:
The memory module might be very hot. Turn off the computer and wait three to
five minutes to let the computer cool before opening the computer cover.
Your computer has 12 slots for installing or replacing DDR3 ECC UDIMMs (double
data rate 3 error correction code unbuffered dual in-line memory modules) or
DDR3 ECC RDIMMs (double data rate 3 error correction code registered dual
inline memory modules).
When installing or replacing memory modules, use the following guidelines:
v Use either DDR3 ECC UDIMMs or DDR3 ECC RDIMMs for your computer. Do
v If your computer has only one CPU installed, be sure to install memory modules
v If your computer has two CPUs installed, install equal numbers of memory
6. Slide the power supply assembly toward the front of the computer and lift it
out from the chassis.
7. Ensure that the new power supply is the correct replacement. Some power
supplies automatically sense the voltage, some power supplies are voltage
specific, and some power supplies have a voltage-selection switch. If there is a
voltage-selection switch, use a ballpoint pen to slide the switch, if necessary.
Note: For models that have a voltage-selection switch:
v If the voltage supply range is 100–127 V AC, set the switch to 115 V.
v If the voltage supply range is 200–240 V AC, set the switch to 230 V.
8. Install the new power supply into the chassis so that the screw holes in the
power supply align with those in the chassis.
Note: Use only the screws provided by Lenovo.
9. Install and tighten the four screws at the rear of the chassis to secure the
power supply.
of the chassis.
board. Make sure to reconnect the power cable to the graphics cards that
require an additional cable.
Attention
Do not open your computer or attempt any repair before reading and understanding the
"Important safety information" in the ThinkStation Safety and Warranty Guide that came
with your computer. To obtain a copy of the ThinkStation Safety and Warranty Guide, go to:
http://www.lenovo.com/support.
not install both the UDIMMs and RDIMMs into the same computer.
only in the memory slots adjacent to that CPU.
modules in both sets of CPU DIMM slots for maximum performance. And the
total amount of memory should be evenly balanced between the 2 banks. For
Chapter 11. Replacing FRUs - Ibiza Computers
141
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