Lenovo E470, Hardware Maintenance Manual

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Error messages
Table 3. Error messages
Symptom or error FRU or action, in sequence
Fan error. 1. Replace the fan .
2. Apply thermal grease.
3. Replace the system board.
Thermal sensing error. Replace the system board .
This system does not support batteries that are not
genuine Lenovo-made or authorized. The system will
continue to boot, but may not charge unauthorized
batteries.
Attention: Lenovo has no responsibility for the
performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out
of their use.
Replace the battery .
Beep symptoms
Table 4. Beep symptoms
Symptom or error FRU or action, in sequence
Four cycles of four short beeps Replace the system board.
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep 1. Replace the memory module .
2. Replace the system board.
Three short beeps, pause, one short beep, pause, one
more short beep, pause, and three short beeps
Remove the device from ExpressCard slot.
Five short beeps Replace the system board.
One long and two short beeps Replace the system board.
Five short beeps, pause, five short beeps, and pause Replace the system board.
No-beep symptoms
Table 5. No-beep symptoms
Symptom or error FRU or action, in sequence
No beep, power-on indicator on, LCD blank, and no
POST.
1. Ensure that every connector is connected tightly
and correctly
.
2. Reseat memory module.
3. Replace the system board.
No beep, power-on indicator on, and LCD blank during
POST.
1. Reseat memory module .
2. Replace the system board.
The power-on password prompt appears. A power-on password or a supervisor password is set.
Type the password and press
Enter .
The hard-disk password prompt appears. A hard disk password is set. Type the password and
press
Enter .
Chapter 4
.
Related service information
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