Beep Symptoms
Symptom / Error FRU / Action
Continuous beep. 1. System Board
One beep and a blank,
unreadable, or flashing
LCD.
1. LCD Assembly
2. System Board
3. SIMM Card
4. DC/DC Card
One beep, and the message
“Boot source (TPF) cannot
be found.”
1. TPF (in Slot 1)
2. System Board (TPF
Controller)
One beep, and the message
“Unable to access boot
source.”
1. TPF (in Slot 1)
2. System Board (TPF
Controller)
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
you press the power on/off
button.
1. Connect an AC
adapter or install a
fully charged battery.
Computer cannot
power-on due to low
battery voltage.
One beep every second. 1. Connect AC adapter
or install fully
charged battery
(allow computer to
complete shutdown
before changing the
battery).
Computer is shutting
down due to low
battery voltage.
Two short beeps. 1. POST error. See
“Symptom-to-FRU
Index” on page 296.
Three short beeps. 1. Move computer to a
cooler environment.
Battery or computer
high temperature
threshold has been
exceeded.
Four short beeps every five
seconds and a blank LCD.
1. System Board
2. SIMM Card
3. Modem Card
ThinkPad 710T (2523) 299
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