IBM THINKPAD 760C/CD (9546) - Manual (Page 377)

Symptom / Error FRU / Action in Sequence
One beep, and the message
“Unable to access boot
source.” 1. Boot device
2. System board
One long, two short beeps
and a blank or unreadable
LCD. 1. System board
2. Video card
3. 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.) 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 (allows system to
complete shutdown
before changing the
battery).
Two short beeps with error
codes. POST error. See
“Numeric Error Codes” on
page 359.
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 349.
2. System board
3. DC/DC card
4. Power sources
No beep, power-on indicator
on, and a blank LCD during
POST. 1. System board
2. DC/DC card
3. CPU card
No beep, power-on indicator
on, and a blinking cursor
only during POST. 1. System board
2. CPU card
3. DC/DC card
No beep during POST but
system runs correctly. 1. Turn the volume up
and check the speaker.
2. Check whether the
DSP card or Audio
(ESS) card connector
is loose and reseat
the connector.
3. Speaker
4. DSP card/audio (ESS)
card
5. DC/DC card
ThinkPad 760 (9546, 9547) 365