Lenovo 2516ADU, Hardware Maintenance Manual

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Beep symptoms
Table 4. Beep symptoms
Symptom or error FRU or action, in sequence
One beep and a blank, unreadable, or flashing LCD. 1. Reseat the LCD connector .
2. LCD assembly.
3. External CRT.
4. System board.
One long and two short beeps, and a blank or unreadable
LCD. 1. System board .
2. LCD assembly.
3. DIMM.
Two short beeps with error codes. POST error. See “Numeric error codes” on page 61.
Two short beeps and a blank screen. 1. System board .
2. DIMM.
Two or more beeps, or a continuous beep. Operating
system starts successfully. If a mini-PCI Ethernet card is installed, confirm that Alert
On LAN 2 in BIOS Setup Utility is disabled .
Three short beeps, pause, three more short beeps, and
one short beep.
One short beep, pause, three short beeps, pause, three
more short beeps, and one short beep.
1. DIMM .
2. System board
Only the cursor appears. Reinstall the operating system .
Four cycles of four short beeps and a blank screen. System board (security chip)
Five short beeps and a blank screen. 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. Make sure that every connector is connected
tightly and correctly
.
2. DIMM.
3. System board.
No beep, power-on indicator on, and LCD blank during
POST. 1. Reseat DIMM .
2. 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
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Related service information
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