SYMPTOM-TO-FRU ERROR MESSAGES
Beep symptoms
No Beep Symptoms
Symptom or error
FRU or action, in
sequence
Continuous beeps.
1. System board.
One beep and a blank,
unreadable, or flashing
LCD.
1. Reseat the LCD
connector.
2. LCD assembly.
3. System board.
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 assembly.
One long beep followed by
four short beeps each time
the power switch is
operated.
(System cannot power on
because of low battery
voltage.)
Connect the AC Adapter
or install a fully charged
battery.
One beep every second.
(System is shutting down
because of low battery
voltage.)
Connect the AC Adapter
or install a fully charged
battery. (Allow the
system to shut down
completely before
changing the battery.)
Two short beeps with error
codes.
POST error. See
“Numeric error codes” on
page 19.
Two short beeps with blank
screen.
1. System board.
Symptom or error
FRU or action, in
sequence
No beep, power-on indicator
not on, and a blank LCD
during POST.
1. Go to “Power system
checkout” on
page 10.
2. System board.
3. Check the power
outlet.
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.
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ThinkPad 600X Hardware Maintenence Manual
