SYMPTOM-TO-FRU INDEX
Beep Symptoms
Symptom / Error
FRU / Action in Sequence
Continuous beeps.
1. Reseat the CPU card.
2. Reseat the video card.
3. System board
One beep and a blank,
unreadable, or flashing
LCD.
1. Reseat the LCD
connector.
2. Reseat the CPU card.
3. LCD assembly
4. System board
5. CPU card
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. Reseat the video
card.
2. Reseat the CPU card.
3. Video card
4. System board
5. 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. (Allow the
system to completely shut
down before changing the
battery.)
Two short beeps with error
codes.
POST error. See
“Numeric Error Codes” on
page 52.
Two short beeps with blank
screen.
1. 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 36.
2. System board
3. Check the power
outlet.
No beep, power-on indicator
on, and a blank LCD during
POST.
1. Reseat the CPU card.
2. System board
No beep, power-on indicator
on, and a blinking cursor
only during POST.
1. System board
ThinkPad 770, 770E, 770X and 770Z
57
Summary of Contents for ThinkPad 770E
Page 80: ...FRU REMOVALS AND REPLACEMENTS 74...
Page 102: ...FRU REMOVALS AND REPLACEMENTS Locate the microphone spacer and cable 96...
Page 111: ...FRU REMOVALS AND REPLACEMENTS ThinkPad 770 770E 770X and 770Z 105...
Page 123: ...PARTS LIST Parts List ThinkPad 770 770E 770X and 770Z 117...
Page 136: ...IBM Part Number 37L5152 Printed in U S A S1 L 9621 2...