Do not use any power adapter that shows corrosion at the ac input pins and/or shows signs of overheating (such as deformed plastic) at the ac input or anywhere on the power adapter.

Do not use any power cords where the electrical contacts on either end show signs of corrosion or overheating or where the power cord appears to have been damaged in any way.

Extension cords and related devices

Ensure that extension cords, surge protectors, uninterruptible power supplies, and power strips that you use are rated to handle the electrical requirements of the product. Never overload these devices. If power strips are used, the load should not exceed the power strip input rating. Consult an electrician for more information if you have questions about power loads, power requirements, and input ratings.

Plugs and outlets

If a receptacle (power outlet) that you intend to use with your computer equipment appears to be damaged or corroded, do not use the outlet until it is replaced by a qualified electrician.

Do not bend or modify the plug. If the plug is damaged, contact the manufacturer to obtain a replacement.

Some products are equipped with a three-pronged plug. This plug fits only into a grounded electrical outlet. This is a safety feature. Do not defeat this safety feature by trying to insert it into a non-grounded outlet. If you cannot insert the plug into the outlet, contact an electrician for an approved outlet adapter or to replace the outlet with one that enables this safety feature. Never overload an electrical outlet. The overall system load should not exceed 80 percent of the branch circuit rating. Consult an electrician for more information if you have questions about power loads and branch circuit ratings.

Be sure that the power outlet you are using is properly wired, easily accessible, and located close to the equipment. Do not fully extend power cords in a way that will stress the cords.

Carefully connect and disconnect the equipment from the electrical outlet.

Batteries

All personal computers manufactured by Lenovo contain a non-rechargeable coin cell battery to provide power to the system clock. In addition many mobile products such as ThinkPad notebook PCs utilize a rechargeable battery pack to provide system power when in portable mode. Batteries supplied by Lenovo for use with your product have been tested for compatibility and should only be replaced with approved parts.

viiiThinkPad® T40 Series Service and Troubleshooting Guide

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Lenovo T40 manual Extension cords and related devices, Plugs and outlets, Batteries
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T40 specifications

The Lenovo ThinkPad T40 is a highly regarded laptop that has made a significant impact in the business and personal computing markets since its release in the early 2000s. Known for its durability, performance, and practicality, the T40 is a part of the ThinkPad series, which has a storied history of meeting the demands of professionals and everyday users alike.

One of the standout features of the T40 is its robust design. The laptop features a magnesium alloy casing that provides superior protection against everyday wear and tear. This durability is complemented by its spill-resistant keyboard, which is designed to protect the internal components from accidental liquid spills, a common concern for mobile users.

At the heart of the T40 is an Intel Pentium M processor, which was built to deliver excellent performance while being energy efficient. This was particularly advantageous for users who needed to work on the go, as it allowed for better battery life compared to traditional desktop CPUs. The T40 offers a variety of processor options, ranging from the 1.3 GHz to the 1.6 GHz Pentium M processor, each delivering a good balance of speed and efficiency.

The display is another key characteristic of the T40, featuring a 14.1-inch screen with options for both 1024x768 and higher resolutions. The LCD panel provides good color reproduction and clarity, making it suitable for both office tasks and multimedia consumption. Additionally, the T40 has a built-in trackpoint and a touchpad, offering users multiple input methods for flexibility in navigation.

For connectivity, the T40 is equipped with a range of ports, including USB 2.0, Ethernet, and a PC Card slot, allowing for easy connection to various peripherals and networks. It also supports Wi-Fi, providing users with the ability to connect to wireless networks seamlessly.

Storage options for the T40 include both traditional hard drives and, in some models, solid-state drives, which offer faster data access speeds and improved reliability. The laptop supports a maximum of 2GB of RAM, which, while modest by today’s standards, was sufficient for most business applications during its time.

In summary, the Lenovo ThinkPad T40 is a remarkable combination of durability, performance, and practicality. Its well-rounded features, from its reliable processors to its sturdy build quality, have solidified its place as a respected choice among portable laptops for professionals and casual users alike. Despite being an older model, its legacy continues to be appreciated for the standards it set in mobile computing.
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