Filter
Top Products
Beep Symptoms
Symptom / Error FRU / Action in Sequence
Continuous beeps. System board
One beep and a blank,
unreadable, or flashing
LCD.
1. Reseat the LCD
connector.
2. LCD unit
3. System board
4. Subcard
One beep, and the message
“Unable to access boot
source.”
1. Boot device
2. System board
One long and two short
beeps, and a blank or
unreadable LCD.
1. System board
2. LCD unit
One long beep followed by
four short beeps each time
the power switch is
operated.
(System cannot power-on
due to low battery voltage.)
Connect the AC Adapter
or install a fully charged
battery.
One beep every second.
(System is shutting down
due to low battery voltage.)
Connect the AC Adapter
or install a fully charged
battery. (Allow the
system to complete
shutdown before
changing the battery.)
Two short beeps with error
codes.
POST error. See
“Numeric Error Codes” on
page 40.
Two short beeps with blank
screen.
System board
No Beep Symptoms
Symptom / Error FRU / Action in Sequence
No beep, power-on indicator
not on, and a blank LCD
during POST.
1. Go to “Power
Systems Checkout”
on page 33.
2. System board
3. Subcard
4. Power sources
No beep, power-on indicator
on, and a blank LCD during
POST.
1. System board
2. Subcard
No beep, power-on indicator
on, and a blinking cursor
only during POST.
1. System board
2. Subcard
No beep during POST but
system runs correctly.
1. Turn the volume up
and check the
speaker.
2. Speaker
3. System board
4. Subcard
46 IBM Mobile Systems HMM