Locating Frus And Crus - Lenovo Thinkpad L570 Hardware Maintenance Manual

Table 5. Function keys and key combinations (continued)
Function keys and Description
key combinations
Fn+B This key combination has the same function as the Break key on a conventional external
keyboard.
Fn+K This key combination has the same function as the ScrLK or Scroll Lock key on a conventional
external keyboard.
Fn+P This key combination has the same function as the Pause key on a conventional external
keyboard.
Fn+S This key combination has the same function as the SysRq key on a conventional external
keyboard.
Fn+4 Press Fn+4 to put the computer into sleep mode. To wake up the computer, press any key
or the power button.

Locating FRUs and CRUs

This topic introduces the following service parts:
• "Major FRUs and CRUs" on page 55
• "LCD FRUs and CRUs" on page 57
Notes:
• Each FRU is available for all types or models, unless otherwise specified.
• CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called a
"Customer Replaceable Unit" or "CRU." Some CRUs are designated as self-service CRUs and others are
designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-service
CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according
to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU
information and replacement instructions are shipped with your product and are available from Lenovo at any time
upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic
version of this manual can be found at http://www.lenovo.com/support. Click User Guides & Manuals and then
follow the on-screen instructions to find the manual for your product. You might be required to return the defective
part that is replaced by the CRU. When return is required: (1) return instructions, a prepaid shipping label, and a
container will be included with the replacement CRU; and (2) you might be charged for the replacement CRU if
Lenovo does not receive the defective CRU within thirty (30) days of your receipt of the replacement CRU. See your
Lenovo Limited Warranty documentation for full details.
ThinkPad computers contain the following types of CRUs:
– Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by trained
service technicians at an additional cost.
– Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill level.
Trained service technicians can also provide service to install or replace the parts under the type of warranty
designated for the customer's machine.
OP
• FRUs marked with
54
L570 Hardware Maintenance Manual
are available as options.