LCD-Related Symptoms

LCD FRU Replacement Notice

The TFT LCD for the computer contains many thin-film transistors (TFTs). A small number of missing, discolored, or lighted dots is a characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing, discolored, or lighted dots in any background is:

vSVGA : 5 or more bright dots, 5 or more dark dots, or a total of 9 or more bright and dark dots.

vXGA : 8 or more bright dots, 8 or more dark dots, or a total of 9 or more bright and dark dots.

Symptom/Error

FRU/Action in Sequence

 

 

 

LCD backlight does not

v Keyboard (if contrast and

work.

 

brightness function keys do not

 

 

LCD is too dark.

 

work)

v

 

LCD brightness cannot

Reseat LCD connector

v Check LCD inverter ID

be adjusted.

v

LCD Cable ASM

 

LCD contrast cannot be

v

LCD Inverter board (12.1); LCD

adjusted (HPA LCD

 

Inverter/LED board (13.0/13.3)

models only).

 

v

LCD

 

 

v

System board

Unreadable LCD screen.

v

Reseat LCD connector

 

Missing pixels in

v

Check LCD inverter ID

characters.

v

LCD Cable ASM

Abnormal screen

v

LCD Inverter board (12.1); LCD

 

 

Inverter/LED board (13.0/13.3)

Wrong color displayed.

v

LCD

 

v

System board

LCD has extra horizontal

v Check LCD inverter ID

or vertical lines

v

LCD Cable ASM

displayed.

 

v LCD Inverter board (12.1); LCD

 

 

Inverter/LED board (13.0/13.3)

 

v

LCD

 

v

System board

 

 

 

42ThinkPad i Series 1200/1300 HMM

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Madge Networks 1300, 1200 manual LCD-Related Symptoms, LCD FRU Replacement Notice

1300, 1200 specifications

Madge Networks was a pioneering entity in the networking industry, notably recognized for its advanced solutions in the area of Token Ring technology during the late 20th century. The Madge Networks 1200 and 1300 series, launched in the mid-1990s, represented significant advancements in network performance and reliability.

The Madge Networks 1200 series was designed to cater to businesses looking for a robust networking infrastructure. This series supported Token Ring networks, which offered advantages such as reduced collision domains, enhanced fault tolerance, and improved data integrity. With a throughput of up to 16 Mbps, the 1200 series provided companies with the ability to efficiently handle data-intensive applications. Its architecture allowed for seamless integration with existing networks, ensuring a smooth transition for organizations upgrading their infrastructure.

On the other hand, the Madge Networks 1300 series took performance a step further. It offered higher throughput capabilities, advancing up to 100 Mbps. This was a remarkable leap for organizations striving for increased bandwidth and lower latency in their communications. The 1300 series featured more advanced management tools, providing network administrators with enhanced visibility and control over network performance. These tools facilitated real-time monitoring and troubleshooting, which were vital for maintaining optimal network health.

Both series utilized proprietary technologies such as the Madge Token Ring ASIC, which improved reliability and performance under high-load conditions. They also featured support for multiple network topologies and configurations, making them highly versatile for different business environments. The hardware was designed for easy scalability, allowing enterprises to expand their networking capabilities without significant overhauls.

Security features were also integrated into both the 1200 and 1300 series. With built-in functionalities for network access control and error detection, these devices ensured a secure networking environment. Each device was engineered to support redundancy protocols, minimizing chances of service disruptions, crucial for mission-critical applications.

In summary, the Madge Networks 1200 and 1300 series exemplified the networking innovations of their era, combining performance with reliability and scalability. They catered to various business needs, providing a flexible and secure networking solution that paved the way for future advancements in enterprise networking. Their legacy continues to influence modern networking technologies.