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2.1 Preliminary Steps

IMPORTANT: Use AC Power when running POST, Computer Setup, or Computer Checkup. A low-battery condition could initiate Suspend or Hibernation and interrupt the test.

Before running POST and Computer Checkup, complete the following steps:

1.Obtain established passwords. If you must clear the passwords, go to Section 2.2.

2.Ensure that the hard drive is installed in the computer.

2.Ensure that the battery pack is installed in the computer and the AC power is connected to the computer and plugged into an AC power source.

4.Turn on the computer.

5.If a power-on password has been established, type the password and press Enter.

NOTE: The key icon appears on the display when the computer is turned on to indicate that QuickLock/QuickBlank has been initiated. Type the power-on password to

exit QuickLock/QuickBlank. If the password is unknown, it must be cleared (see Section 2.2).

6.Run Computer Setup (Section 2.5).

7.Use the Hotkeys to adjust the contrast (Fn+F9) and brightness (Fn+F10) to the center of their ranges and leave the display open. On models with color TFT displays, contrast is not applicable.

8.Turn off the computer and all external devices.

9.Disconnect any external devices that you do not want to test. If you want to use the printer to log error messages, leave it connected to the computer.

NOTE: If a problem only occurs when an external device is connected to the computer, the problem could be with the external device or its cable. Isolate the problem by running POST with and without the external device connected.

10.Use Advanced Diagnostics and loopback plugs in the serial and parallel connectors if you plan to test these ports. You may run Advanced Diagnostics from the hard drive or from a diskette.

If you are running Diagnostics from the hard drive, complete the following steps:

a.Turn on or restart the computer.

b.Press F10 when the cursor appears in the upper right corner of the screen. If you do not press F10 in time, restart the computer and try again. The Welcome screen appears.

2-2 Troubleshooting

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Compaq 4140T, 4130T, 4150T, 4131T, 4200, 4125T, 4160T SLIMLINE, 4125D, 4115, 4120T, 4110D manual Preliminary Steps

4130T, 4200, 4115, 4150, 4131T specifications

The Compaq 4160T Slimline, along with its variants – 4125D, 4150, 4120T, and 4150T – represents a series of personal computers that were engineered during the early 1990s. These systems were particularly popular for their compact design and efficient performance, catering to both individual users and businesses seeking reliable computing solutions.

The Compaq 4160T Slimline was designed with portability in mind. It featured a slim form factor that allowed it to fit easily into limited spaces, making it an ideal choice for environments where desk space was at a premium. One of the standout characteristics of the 4160T was its lightweight design, which aided in ease of transport.

The 4125D variant was notable for its robust performance capabilities. It utilized an Intel 486 processor, which provided enhanced processing power for multitasking and running memory-intensive applications. The system came equipped with an array of RAM options and upgradable storage, making it adaptable to various user needs.

The Compaq 4150 and 4150T models built upon the strong foundation of their predecessors, offering improved specifications. These models supported a greater range of peripheral devices, including external drives, printers, and modems, thanks to their extensive connectivity options. The 4150T further featured advanced graphics capabilities, making it suitable for light gaming and multimedia tasks.

The 4120T targeted users who prioritized a balance between performance and cost. With its value-driven design, this model provided essential computing features and was often utilized in educational settings and small offices. Its reliability and ease of use made it a favored choice for individuals who required straightforward functionality.

All models in this series showcased Compaq's commitment to innovation, featuring technologies such as integrated memory management and support for DOS-based applications. Additionally, the systems were equipped with customizable options, allowing users to choose specific configurations that best suited their unique requirements.

In summary, the Compaq 4160T Slimline and its counterparts presented a solution that combined compact design with practical performance. Their legacy continues to remind us of the evolution of personal computing and the foundational role that systems like these played in the development of modern PCs. These models represented a bridge between earlier computing technology and the more sophisticated devices that followed, paving the way for advancements in the industry.