Beep symptoms

Table 3. Error messages (continued)

Symptom or error	FRU or action, in sequence

This system does not support batteries that are not	Replace the battery.
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.

The connected AC adapter has a lower wattage than the	Charge the ac power adapter.
recommended model which was shipped with the system.
This will increase the time to charge the battery, and
system performance will be adjusted to match the
available power.
Please connect the AC adapter which was shipped with
the system for best system performance.
Press the ESC key to continue. Docking station is
removed or its ID is different, press F3 to power off
system and restore correct docking station, press F4 to
normal boot.

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	1.	System board
LCD.	2.	LCD assembly
	3.	DIMM

Two short beeps with error codes.	POST error. See Numeric error codes.

Two short beeps and a blank screen.	1.	System board
	2.	DIMM

Two or more beeps, or a continuous beep. Operating	If a mini-PCI Ethernet card is installed, confirm that Alert
system starts successfully.	On LAN 2 in ThinkPad Setup is disabled.

Three short beeps, pause, three more short beeps, and	1.	DIMM
one short beep.	2.	System board

One short beep, pause, three short beeps, pause, three
more short beeps, and one short beep.

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

IBM W520, T520I manual Beep symptoms