2. Press and release each key on the keyboard.

If the keyboard and its cable appear to be free of physical damage, and the keys work, go to step 4.

If the keyboard or its cable are damaged, continue to step 3.

3. Swap the faulty keyboard with a working keyboard.

If the problem is resolved, the keyboard must be replaced. See "Getting Help," for instructions on obtaining technical assistance. 4. Run the keyboard test in the Dell Diagnostics.

If you can use the keyboard to select the keyboard test, go to step 6.

If you cannot use the keyboard to select the keyboard test, continue to step 5.

5.Swap the faulty keyboard with a working keyboard.

6.Did the keyboard test run successfully?

If the problem is resolved, the keyboard must be replaced. If the problem is not resolved, the keyboard controller on the system board is faulty. See "Getting Help," for instructions on obtaining technical assistance.

Troubleshooting the Basic I/O Functions

Problem

A system error message indicates an I/O port problem

A device connected to the port does not function properly

Action

1.Enter the System Setup program, and check the Serial Port 1, Serial Port 2, and Parallel Port settings. If the communications ports are set to Enabled, go to step 3.

If the communications ports are not set to Enabled, continue to step 2.

2.Change the Serial Port 1, Serial Port 2, and Parallel Port settings to Enabled; then reboot the system.

3.Check the system setup. See "Using the System Setup Program" in the User's Guide for instructions.

If the system setup is correct, go to step 5.

4.Change the necessary statements in the system setup. If the port problem is confined to a particular application program, see the application program's documentation for specific port configuration requirements.

5.Reboot the system from the diagnostics diskette, and run the serial ports test and/or the parallel ports test in the Dell Diagnostics.

If the tests did not run successfully, see "Getting Help," for instructions on obtaining technical assistance.

6.If the problem persists, see one of the following procedures, "Troubleshooting a Parallel Printer" or "Troubleshooting a Serial I/O Device," depending on the malfunctioning device.

Troubleshooting a Serial I/O Device

Problem

Device connected to one of the serial ports is not working

Action

1.Turn off the system and any peripheral devices connected to the serial ports. If there is only one serial device connected to the system, go to step 4.

2.Disconnect the devices from the serial ports, and connect the malfunctioning device to the other port.

3.Turn on the power to the system.

If the problem is resolved, the serial port may be defective. See "Getting Help," for instructions on obtaining technical assistance.

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Dell 2500 manual Troubleshooting the Basic I/O Functions, Troubleshooting a Serial I/O Device

2500 specifications

The Dell 2500 is a remarkable embodiment of innovation in the world of computing. Renowned for its robust performance and versatility, the Dell 2500 caters to a wide array of users, from businesses to educational institutions, and even casual home users. Equipped with cutting-edge features and technologies, it stands out in the competitive market of laptops and desktops.

At the core of the Dell 2500 is its powerful processor options. Users can choose from various Intel Core i5 and i7 configurations, ensuring that they have the computing power required for demanding applications, multitasking, and intensive workloads. The speed and reliability of these processors are complemented by ample RAM, which ranges between 8GB and 16GB, optimizing performance during intense usage scenarios such as gaming, video editing, or data analysis.

One of the key characteristics of the Dell 2500 is its stunning display. Featuring a Full HD (1920 x 1080) resolution, the laptop or desktop’s screen delivers vivid colors and sharp images. This visual clarity is further enhanced by LED backlighting, which not only brightens the display but also improves energy efficiency, making the device suitable for both work and entertainment.

Another noteworthy aspect of the Dell 2500 is its storage solutions. Equipped with high-speed SSDs, users enjoy quick boot times, faster data access, and improved overall system responsiveness. The Dell 2500 offers different storage capacities, allowing users to choose a configuration that meets their needs without sacrificing performance.

In terms of connectivity, the Dell 2500 features a wide array of ports, including USB Type-C, USB 3.0, HDMI, and Ethernet, ensuring that users can connect to versatile peripherals and networks seamlessly. Additionally, the laptop offers Wi-Fi 6 capabilities, providing lightning-fast wireless connectivity, which is crucial for users who rely on cloud-based applications and streaming services.

Security features on the Dell 2500 include biometric options such as a fingerprint reader, alongside traditional password protection to safeguard user data. With diverse customization options, users can tailor the device to their specific use cases, ensuring a personalized experience.

In summary, the Dell 2500 combines powerful performance, stunning visuals, ample storage, extensive connectivity options, and robust security measures to cater to a diverse range of users. Its thoughtful design and innovative technologies make it a top contender in today’s computing landscape, ensuring that it meets the demands of modern work and play.