Lenovo G50-45 User Guide - Lenovo G Z Series - Page 32

Troubleshooting, Sleep problems, Display panel problems, Lenovo - test

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Chapter 4. Troubleshooting Sleep problems The critical low-battery error • The battery power is getting low. Connect the AC power message appears, and the adapter to the computer, or replace the battery pack with a computer immediately turns off. fully charged one. The computer enters sleep • Make sure that: mode immediately after Power- - The battery pack is charged. on self-test (POST). - The operating temperature is within the acceptable range. See "Chapter 2. Use and care Information" in the Lenovo Safety and General Information Guide. Note: If the battery pack is charged and the temperature is within range, have the computer serviced. The computer does not return from sleep mode, and the computer does not work. • If your computer is in sleep mode, connect the AC power adapter to the computer, then press any key or the Power button. • If the system still does not return from sleep mode, stops responding, or cannot be turned off, reset the computer. Unsaved data may be lost. To reset the computer, press and hold the Power button for four seconds or more. If the computer is still not reset, remove the AC power adapter and the battery pack. Display panel problems The screen is blank. The screen is unreadable or distorted. Incorrect characters appear on the screen. • Do the following: - If you are using the AC power adapter or the battery pack, and the battery status indicator is on, press F12 ( ) to make the screen brighter. - If the power indicator is blinking, press the Power button to resume from sleep mode. - If the problem persists, follow the solution in the next problem "The screen is unreadable or distorted." - Press F9 ( ) to confirm whether the backlight of the LCD screen has been turned off. • Make sure that: - The display device driver is installed correctly. - The screen resolution and color quality are correctly set. - The monitor type is correct. • Are the operating system or programs installed correctly? If they are installed and configured correctly, have the computer serviced. 26

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26
Chapter 4. Troubleshooting
Sleep problems
The critical low-battery error
message appears, and the
computer immediately turns off.
•
The ba
tt
ery power
i
s
g
e
tting
low. Co
nn
ec
t
t
he AC power
adap
t
er
t
o
t
he comp
ut
er, or replace
t
he ba
tt
ery pack w
it
h a
f
u
lly char
g
ed o
n
e.
The computer enters sleep
mode immediately after Power-
on self-test (POST).
•
Make s
u
re
t
ha
t
:
-
The ba
tt
ery pack
i
s char
g
ed.
-
The opera
ting
t
empera
tu
re
i
s w
it
h
in
t
he accep
t
able ra
ng
e.
S
ee
“
Chap
t
er 2. Use a
n
d care I
n
forma
ti
o
n”
in
t
he
Lenovo
Safety and General Information Guide
.
Note:
If
t
he ba
tt
ery pack
i
s char
g
ed a
n
d
t
he
t
empera
tu
re
i
s w
it
h
in
ra
ng
e, have
t
he comp
ut
er serv
i
ced.
The computer does not return
from sleep mode, and the
computer does not work.
•
If yo
u
r comp
ut
er
i
s
in
sleep mode, co
nn
ec
t
t
he AC power
adap
t
er
t
o
t
he comp
ut
er,
t
he
n
press a
n
y key or
t
he Power
b
utt
o
n
.
•
If
t
he sys
t
em s
ti
ll does
n
o
t
re
tu
r
n
from sleep mode, s
t
ops
respo
n
d
ing
, or ca
nn
o
t
be
tu
r
n
ed off, rese
t
t
he comp
ut
er.
U
n
saved da
t
a may be los
t
. To rese
t
t
he comp
ut
er, press a
n
d
hold
t
he Power b
utt
o
n
for fo
u
r seco
n
ds or more. If
t
he
comp
ut
er
i
s s
ti
ll
n
o
t
rese
t
, remove
t
he AC power adap
t
er
a
n
d
t
he ba
tt
ery pack.
Display panel problems
The screen is blank.
•
Do
t
he follow
ing
:
-
If yo
u
are
u
s
ing
t
he AC power adap
t
er or
t
he ba
tt
ery pack,
a
n
d
t
he ba
tt
ery s
t
a
tu
s
in
d
i
ca
t
or
i
s o
n
, press
F12 (
)
t
o
make
t
he scree
n
br
ig
h
t
er.
- If
t
he power
in
d
i
ca
t
or
i
s bl
in
k
ing
, press
t
he Power b
utt
o
n
t
o res
u
me from sleep mode.
- If
t
he problem pers
i
s
t
s, follow
t
he sol
uti
o
n
in
t
he
n
ex
t
problem
“
The scree
n
i
s
un
readable or d
i
s
t
or
t
ed.
”
- Press
F9 (
)
t
o co
n
f
i
rm whe
t
her
t
he backl
ig
h
t
of
t
he
LCD scree
n
has bee
n
tu
r
n
ed off.
The screen is unreadable or
distorted.
•
Make s
u
re
t
ha
t
:
-
The d
i
splay dev
i
ce dr
i
ver
i
s
in
s
t
alled correc
t
ly.
-
The scree
n
resol
uti
o
n
a
n
d color q
u
al
it
y are correc
t
ly se
t
.
-
The mo
nit
or
t
ype
i
s correc
t
.
Incorrect characters appear on
the screen.
•
Are
t
he opera
ting
sys
t
em or pro
g
rams
in
s
t
alled correc
t
ly?
If
t
hey are
in
s
t
alled a
n
d co
n
f
igu
red correc
t
ly, have
t
he
comp
ut
er serv
i
ced.