Chapter 6. Replacing FRUs
Important: Before you replacing FRUs, make sure that the server is working
correctly. Start the server, and make sure that the operating system starts, if an
operating system is installed. If the server is not working correctly, see the
Chapter 4, “Diagnostics,” on page 13 for diagnostic information.
This chapter provides detailed instructions for replacing FRUs in your server.
Attention
Do not open your server or attempt any repair before reading and
understanding the Chapter 1, “About this manual,” on page 1 and the Safety
Information book. To obtain a copy of the Safety Information book, go to:
http://www.lenovo.com/support
Guidelines for trained service technicians
This section contains information for trained service technicians.
Inspecting for unsafe conditions
Use the information in this section to help you identify potential unsafe conditions
in a Lenovo product that you are working on. Each Lenovo product, as it was
designed and manufactured, has required safety items to protect users and service
technicians from injury. The information in this section addresses only those items.
Use good judgment to identify potential unsafe conditions that might be caused by
non-Lenovo alterations or attachment of non-Lenovo features or options that are
not addressed in this section. If you identify an unsafe condition, you must
determine how serious the hazard is and whether you must correct the problem
before you work on the product.
Consider the following conditions and the safety hazards that they present:
v Electrical hazards, especially primary power. Primary voltage on the frame can
cause serious or fatal electrical shock.
v Explosive hazards, such as a damaged CRT face or a bulging capacitor.
v Mechanical hazards, such as loose or missing hardware.
To inspect the product for potential unsafe conditions, complete the following
steps:
1. Make sure that the power is off and the power cord is disconnected.
2. Make sure that the exterior cover is not damaged, loose, or broken, and observe
any sharp edges.
3. Check the power cord:
v Make sure that the third-wire ground connector is in good condition. Use a
meter to measure third-wire ground continuity for 0.1 ohm or less between
the external ground pin and the frame ground.
v Make sure that the power cord is the correct type.
v Make sure that the insulation is not frayed or worn.
4. Remove the cover.
© Copyright Lenovo 2010 29
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