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.

 

 

 

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

1.

System board

LCD.

2.

LCD assembly

 

3.

DIMM

 

 

Two short beeps with error codes.

POST error. See “Numeric error codes” on page 40.

 

 

 

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

 

 

 

42ThinkPad T520, T520i, and W520 Hardware Maintenance Manual

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Lenovo 4284WW9PC10B371, W520, T520i manual Beep symptoms
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T520, W520, 4284WW9PC10B371, T520i specifications

The Lenovo T520i is a robust business laptop that caters to professionals seeking reliability and performance. Part of Lenovo's ThinkPad series, specifically the model number 4284WW9PC10B371, it is designed for multitasking efficiency and mobility.

One of the defining features of the T520i is its impressive performance capabilities. It is equipped with Intel's second-generation Core processors, ranging from i5 to i7, which provide ample power for demanding applications and multitasking scenarios. This model supports up to 16GB of RAM, ensuring smooth operation even with multiple applications running simultaneously.

The T520i features a 15.6-inch high-definition display, offering users a resolution of 1366 x 768 pixels. For those who require superior screen clarity and vibrant color reproduction, the laptop can be upgraded to a Full HD (1920 x 1080) display option. This attribute is especially valuable for professionals working in design or media fields who need precise visuals.

Another characteristic that sets the T520i apart is its durable build quality. As a ThinkPad, it has undergone rigorous testing to meet military-grade standards for durability and reliability. The spill-resistant keyboard and robust chassis are designed to withstand the rigors of everyday use, making it ideal for professionals on the go.

Storage options for the T520i are versatile, with configurations available for traditional hard drives and solid-state drives (SSD). The SSD option not only enhances the overall speed of the system but also improves boot times and application loading, significantly contributing to productivity.

Connectivity options on the T520i are comprehensive. It comes with multiple USB ports, including USB 3.0 for fast data transfer. Additionally, integrated features such as a Gigabit Ethernet port, VGA output for external monitors, and optional 4G LTE connectivity ensure seamless communication and access to networks.

The laptop also boasts Intel HD Graphics, offering sufficient power for everyday tasks, video playback, and light gaming. Furthermore, the inclusion of technologies such as Bluetooth and an integrated webcam enriches user experience through enhanced connectivity and multimedia capabilities.

In conclusion, the Lenovo T520i, with its powerful processors, impressive display options, and rugged design, is a capable choice for professionals who require a reliable, high-performance laptop. Ideal for both business and personal use, it exemplifies Lenovo’s commitment to quality and innovation in the laptop market.
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