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Symptom/Error FRU/Action
One long beep followed by
four short beeps each time
the power switch is
operated.
(System cannot power-on
due to low battery voltage.)
1. Connect the AC
adapter or install a
fully charged battery.
One beep every second.
(System is entering
Suspend mode due to low
battery voltage.)
1. Connect the AC
adapter or install a
fully charged battery
(allows system to
suspend operation
before changing the
battery).
Two short beeps with error
codes.
1. POST error. See
“Numeric Error
Codes” on page 142.
Two short beeps with blank
screen.
1. Top System Board.
2. Bottom System Board.
No-Beep Symptoms
Symptom/Error FRU/Action
No beep, power-on indicator
not on, and a blank LCD
during POST.
1. Go to “Power
Systems Checkout”
on page 135.
2. Top System Board.
3. Power sources.
No beep, power-on indicator
on, and a blank LCD during
POST.
1. Top System Board.
2. Bottom System Board.
No beep, power-on indicator
on, and a blinking cursor
only during POST.
1. Top System Board.
2. Bottom System Board.
No beep during POST but
system runs correctly.
1. Turn the volume up.
2. Speaker.
3. Top System Board.
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