Locating Frus And Crus - Lenovo ThinkPad P51s Manual

Table 6. Status indicators (continued)
Indicator
7 8
System-status indicators
9
ac power status indicator

Locating FRUs and CRUs

This topic introduces the following service parts:
• "Major FRUs" on page 47
• "LCD FRUs" on page 50
• "Miscellaneous parts and other FRUs" on page 51
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. 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.
46
T570 and P51s Hardware Maintenance Manual
Meaning
Blinks for three times:: The computer is initially connected to power.
On: The computer is on (in normal mode).
Off: The computer is off or in hibernation mode.
Blinks quickly:: The computer is entering sleep or hibernation mode.
Blinks slowly: The computer is in sleep mode.
This indicator shows the ac power and battery power status of the computer.
• Green: connected to ac power (battery power 80%–100%)
• Yellow: connected to ac power (battery power 1%–80%)
• Off: not connected to ac power