Table 4. No-beep symptoms (continued)

Symptom or error

FRU or action, in sequence

 

 

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.

 

 

LCD-related symptoms

Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns.

If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.

Note:

This policy applies to all ThinkPad Notebooks purchased on 1 January, 2008 or later.

Lenovo will not provide replacement if the LCD is within specification as we cannot guarantee that any replacement LCD will have zero pixel defects.

One pixel consists of R, G, B sub-pixels.

Table 5. LCD-related symptoms

Symptom or error

FRU or action, in sequence

 

 

No beep, power-on indicator on, and a blank LCD during

System board.

POST.

 

 

 

 

 

• LCD backlight not working.

1.

Reseat the LCD connectors.

LCD too dark.

2.

LCD assembly.

• LCD brightness cannot be adjusted.

3.

System board.

• LCD contrast cannot be adjusted.

 

 

 

 

 

 

LCD screen unreadable.

1.

See important note for “LCD-related symptoms.”

Characters missing pixels.

2.

Reseat all LCD connectors.

Screen abnormal.

3.

LCD assembly.

Wrong color displayed.

4.

System board.

 

 

Horizontal or vertical lines displayed on LCD.

LCD assembly.

 

 

 

 

Intermittent problems

Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a problem recurs.

When analyzing an intermittent problem, do the following:

1.Run the diagnostic test for the system board in loop mode at least 10 times.

2.If no error is detected, do not replace any FRUs.

3.If any error is detected, replace the FRU shown by the FRU code. Rerun the test to verify that no more errors exist.

38Hardware Maintenance Manual

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Lenovo EDGE 13, E31, E30 manual LCD-related symptoms, Intermittent problems, Reseat the LCD connectors, LCD assembly

EDGE 13, E30, E31 specifications

The Lenovo E30, EDGE 13, and E31 are part of Lenovo's well-regarded ThinkPad and Edge series, designed to provide users with versatility, performance, and efficiency. Each model caters to different user needs while maintaining a high standard of build quality and functionality.

The Lenovo E30 is a compact and lightweight business laptop that combines portability with powerful performance. It typically features a 13.3-inch display, making it easy to carry without sacrificing usability. The E30 is equipped with Intel's Core i5 or i7 processors, offering a balance between power and battery efficiency. The laptop supports up to 8GB of RAM, ensuring smooth multitasking for business applications, and provides ample storage options with HDD or SSD configurations available. The integrated graphics chip allows for casual gaming and efficient media playback, while its robust security features, including a fingerprint reader and Trusted Platform Module (TPM), safeguard sensitive information.

Moving to the Lenovo EDGE 13, this model features an ergonomic design and a chiclet keyboard that enhances typing comfort during long working hours. Its 13-inch display boasts vibrant visuals, suitable for both professional presentations and media consumption. The EDGE 13 is also powered by Intel Core processors and can be configured with up to 8GB of RAM, enabling users to run demanding applications seamlessly. Its dedicated graphics option may appeal to users who require enhanced performance for graphic design or gaming. Furthermore, connectivity options are plentiful, including USB 3.0 ports and HDMI output, making it easy to connect peripherals and external displays.

The Lenovo E31 is the larger counterpart in the series, featuring a 14-inch or 15-inch display that is ideal for users who prefer a more extensive screen for their tasks. This model is designed for productivity and collaborative work, with its ample screen real estate facilitating multitasking. Like its predecessors, the E31 is equipped with the latest Intel processors, ensuring it meets the demands of various software applications. The robust build quality is complemented by a spill-resistant keyboard, making it suitable for environmental challenges often faced in business settings. Lenovo emphasizes battery longevity in the E31, which allows users to work longer without needing a recharge.

All three models—E30, EDGE 13, and E31—incorporate advanced technologies such as Lenovo's RapidCharge feature for quick battery refills and enhanced cooling systems that help maintain performance levels during intense tasks. Additionally, Lenovo’s software solutions enhance productivity with tools for managing tasks and securing data.

In summary, whether opting for the portability of the E30, the stylish EDGE 13, or the expanded functionality of the E31, Lenovo offers a solid choice in the business laptop market, tailored to various user needs while ensuring reliability, performance, and security.