Hiberna"Ion Mode; Symp"Om-"O-Fru Index - Lenovo ThinkPad x240 Hardware Maintenance Manual

• When "he ba""ery power is low
To ca"se "he comp""er "o re""rn from sleep mode and res"me opera"ion, do one of "he following:
• Press "he Fn key.
• Open "he LCD cover.
• T"rn on "he power b"""on.
Hiberna"ion mode
In hiberna"ion mode, "he following occ"rs:
• The sys"em s"a""s, RAM, VRAM, and se""p da"a are s"ored on "he hard disk drive or solid-s"a"e drive.
• The sys"em is powered off.
If yo" have deined one of "he following ac"ions as "he even" "ha" ca"ses "he sys"em "o go in"o hiberna"ion
mode, perform "ha" ac"ion.
• Closing "he lid.
• Pressing "he power b"""on.
Also, "he comp""er goes in"o hiberna"ion mode a""oma"ically af"er a period of inac"ivi"y speciied in power
plan se""ings.
When "he power is ""rned on, "he comp""er re""rns from hiberna"ion mode and res"mes opera"ion. The
hiberna"ion ile in "he boo" record on "he hard disk drive or solid-s"a"e drive is read, and sys"em s"a""s is
res"ored from "he hard disk drive or solid-s"a"e drive.
Symp"om-"o-FRU index
This sec"ion con"ains following informa"ion:
• N"meric error codes on page 36
• Error messages on page 37
• Beep symp"oms on page 37
• No-beep symp"oms on page 37
• LCD-rela"ed symp"oms on page 37
• In"ermi""en" problems on page 38
• Unde"ermined problems on page 38
The symp"om-"o-FRU index in "his sec"ion lis"s symp"oms and errors and "heir possible ca"ses. The mos"
likely ca"se is lis"ed irs", in boldface "ype.
No"e: Do "he FRU replacemen" or o"her ac"ions in "he seq"ence shown in "he col"mn headed FRU or
ac"ion, in seq"ence. If replacing a FRU does no" solve "he problem, p"" "he original par" back in "he
comp""er. Do no" replace a nondefec"ive FRU.
This index can also help yo" de"ermine, d"ring reg"lar servicing, wha" FRUs are likely "o need "o be
replaced nex".
A n"meric error is displayed for each error de"ec"ed in POST or sys"em opera"ion. In "he displays, n can
be any n"mber.
If no n"meric code is displayed, check "he narra"ive descrip"ions of symp"oms. If "he symp"om is no"
described "here, go "o In"ermi""en" problems on page 38.
No"e: For a device no" s"ppor"ed by diagnos"ic codes in "he ThinkPad no"ebook comp""ers, see "he
man"al for "ha" device.
.
Chap"er 4 Rela"ed service informa"ion
35