Re"Aining "He Uuid - Lenovo ThinkPad W540 Hardware Maintenance Manual

2. When "he logo is displayed, press Esc. The ThinkPad Conig Informa"ion Upda"e U"ili"y in"erface is
displayed.
3. Type 1 "nder En"er "he ac"ion desired, "hen press En"er. The ThinkPad Serial N"mber Upda"e U"ili"y for
Asse" ID screen is displayed.
4. Type 1 "nder En"er "he ac"ion desired, "hen press En"er. Then follow "he ins"r"c"ions on "he screen
"o res"ore "he serial n"mber of "he sys"em "ni".
If "he MTM and Prod"c" ID n"mbers differ from each o"her on "he rear label, "se wha" is shown for "he
Prod"c" ID ield. See "he following example:
MTM on "he rear label:
TTTT-CTO1WW S/N SSSSSSSS
Prod"c" ID on "he rear label:
TTTT-MMMMMM (Use "his n"mber when se""ing Serial N"mber.)
In "he example, "he Serial N"mber "o be inp"" is 1STTTTMMMMMMSSSSSSSS .

Re"aining "he UUID

The Universally Uniq"e Iden"iier (UUID) is a 128-bi" n"mber "niq"ely assigned "o yo"r comp""er a"
prod"c"ion and s"ored in "he EEPROM of yo"r sys"em board.
The algori"hm "ha" genera"es "he n"mber is designed "o provide "niq"e IDs "n"il "he year A.D. 3400. No "wo
comp""ers in "he world have "he same n"mber.
When yo" replace "he sys"em board, perform "he following s"eps "o crea"e a new UUID for "he sys"em
board if "he sys"em board does no" have a UUID:
No"e: Before yo" perform "he opera"ion, ens"re "ha" "he UEFI/Legacy se""ing wi"hin "he S"ar""p men" in
"he ThinkPad Se""p program is se" "o UEFI Only.
1. Connec" a USB memory key "o "he comp""er.
2. Go "o h""p://www.lenovo.com/main"enance""ili"ies and follow "he ins"r"c"ions on "he screen "o crea"e a
Main"enance Key.
No"e: Only an a""horized Lenovo service "echnician can access "he above Web si"e.
3. Res"ar" "he comp""er.
4. When "he logo screen is displayed, press Esc. The ThinkPad Conig Informa"ion Upda"e U"ili"y in"erface
is displayed.
5. Type 2 "nder En"er "he ac"ion desired, "hen press En"er. The A""o UUID genera"ion ""ili"y in"erface is
displayed.
6. Type y "nder Change UUID. OK? [Y/N], "hen press En"er. A new UUID is crea"ed and wri""en. If a
valid UUID already exis"s, i" is no" overwri""en.
.
Chap"er 8 FRU replacemen" no"ices
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