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Beep Symptoms
Symptom/Error FRU/Action
Continuous beeps. 1. System Board
One beep and a blank,
unreadable, or flashing
LCD.
1. Reseat the LCD
connector. (See
“1090 LCD Assembly”
on page 55.)
2. LCD Assembly
3. System Board
One beep, and the message
“Unable to access boot
source.”
1. Reseat the boot
device.
2. Boot Device
3. System Board
One long, two short beeps
and a blank or unreadable
LCD.
1. System Board
2. LCD Assembly
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 long and one short
beep.
1. System Board
One beep every second.
(System is shutting down
due to low battery voltage.)
1. Connect the AC
Adapter or install a
fully-charged battery
(allows the system to
completely shutdown
before the battery is
charged).
Two short beeps with error
codes.
1. POST error. (See
“Numeric Error Codes”
on page 35.)
Two short beeps with blank
screen.
1. 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 29.
2. System Board
3. Power Sources
No beep, power-on indicator
on, and a blank LCD during
POST.
1. System Board
No beep, power-on indicator
on, and a blinking cursor
only during POST.
1. System Board
38 IBM Mobile Systems HMM