Symptom/Error FRU/Action
Two short beeps with error
codes.
POST error. See
“Numeric Error Codes” on
page 217.
Two short beeps with blank
screen.
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 207.
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. Processor Card (370C,
750Ce, 755C, 755Cs)
No beep, power-on indicator
on, and a blinking cursor
only during POST.
1. System Board
2. Processor Card (370C,
750Ce, 755C, and
755Cs)
3. DC/DC Card
No beep during POST but
system runs correctly.
1. Turn the volume up
and check the
speaker
2. Speaker
3. Audio Card
4. DC/DC Card
222 IBM Mobile Systems HMM
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