IBM ThinkPad 340 Series Hardware Maintenance Manual page 156

Symptom/Error
One long beep followed by
four short beeps each time
the power switch is
operated.
(System cannot power-on
due to low battery voltage.)
One beep every second.
(System is entering
Suspend mode due to low
battery voltage.)
Two short beeps with error
codes.
Two short beeps with blank
screen.
No-Beep Symptoms
Symptom/Error
No beep, power-on indicator
not on, and a blank LCD
during POST.
No beep, power-on indicator
on, and a blank LCD during
POST.
No beep, power-on indicator
on, and a blinking cursor
only during POST.
No beep during POST but
system runs correctly.
LCD-Related (Video) Symptoms
Note that LCD-related symptoms might be a result of
software problems. Therefore, before working on
hardware to correct video problems, make sure that the
system has the latest versions of the video drivers
installed. Systems that do not have the latest versions of
video drivers might experience symptoms such as random
extra pixels.
146
IBM Mobile Systems HMM
FRU/Action
1. Connect the AC
adapter or install a
fully charged battery.
1. Connect the AC
adapter or install a
fully charged battery
(allows system to
suspend operation
before changing the
battery).
1. POST error. See
"Numeric Error
Codes" on page 142.
1. Top System Board.
2. Bottom System Board.
FRU/Action
1. Go to "Power
Systems Checkout"
on page 135.
2. Top System Board.
3. Power sources.
1. Top System Board.
2. Bottom System Board.
1. Top System Board.
2. Bottom System Board.
1. Turn the volume up.
2. Speaker.
3. Top System Board.