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Symptom/Error FRU/Action
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 322.
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
No beep, power-on indicator
on, and a blinking cursor
only during POST.
1. System Board
2. Processor Card
3. DC/DC Card
No beep during POST but
system runs correctly.
1. Turn the volume up
and check the
speaker
2. Speaker
3. DSP Card
4. DC/DC Card
LCD Related Symptoms
The TFT LCD for the notebook computer contains over
921000 thin film transistors (TFTs). A small number of
missing, discolored or lighted dots (on all the time) is
characteristic of TFT LCD technology, but excessive pixel
problems can cause viewing concerns.
Before Replacing the LCD
The LCD should not be replaced unless the number of
dots satisfies the following condition:
The number of missing or discolored, or lighted
dots in any colored background is 21 or more.
Note: For Model 755CDV, see also “Model 755CDV
Symptoms” on page 337 for LCD related
symptoms.
Symptom/Error FRU/Action
No beep, power-on indicator
on, and a blank LCD during
POST.
1. System Board
2. DC/DC Card
3. Video Card
4. Processor Card
336 IBM Mobile Systems HMM