The computer screen is blank.

If you have not turned off the computer but the screen is blank, the computer may be in standby or hibernation, may not be set to display the image on the computer screen, or the display switch or ambient light sensor (select models only) may not be functioning properly.

The suggested actions below may help you determine the reason the computer screen is blank.

To resume from standby or restore from hibernation, briefly press the power button.

Standby and hibernation are energy-saving features that can turn off the display. Standby and hibernation can be initiated by the system while the computer is in Microsoft® Windows® but is not in use or has reached a critical low-battery condition. To change these and other power settings, select Start > Control Panel > Performance and Maintenance > Power Options.

To transfer the image to the computer screen, press fn+f4.

On most models, when an optional external display device, such as a monitor, is connected to the computer, the image can be displayed on the computer screen or the external display, or on both devices simultaneously. When you press fn+f4 repeatedly, the image alternates among the computer display, one or more external display devices, and simultaneous displays on all devices.

Press the display switch on the computer to confirm that it moves freely.

If the computer has a magnetic display switch (select models only), be sure that the computer is not near a strong magnetic field and that no magnetized items (for example, a magnetized screw driver) are laying on the computer.

If the computer has an ambient light sensor (select models only), make sure that the sensor is not obstructed.

The software is functioning abnormally.

If the software becomes unresponsive or responds abnormally:

Restart the computer:

In Windows XP Home, select Start > Turn Off Computer > Restart.

In Windows XP Professional, select Start > Turn Off Computer > Restart > OK. (The Turn Off Computer button may be called the Shut Down button, depending on the network connection.)

If you cannot restart the computer using these procedures, refer to the next section, "The computer is turned on, but is not responding."

Run a virus scan.

If the computer feels unusually warm, allow it to cool to room temperature. For more information about computer overheating, refer to "The computer is extremely warm." later in this chapter.

If you are using an optional wireless mouse, make sure that the mouse battery has an adequate charge.

160 Chapter 15 Troubleshooting

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HP C2N25UA manual Computer screen is blank, Software is functioning abnormally

C2N25UA specifications

HP offers a plethora of laptops catering to various user needs, and the HP C2N25UA and D1E81UA models stand out as compelling options for both personal and professional use. These devices combine powerful performance, modern features, and reliable build quality, making them suitable for diverse computing tasks.

The HP C2N25UA, also known as the HP Pavilion series, delivers a vibrant 15.6-inch display that enhances the visual experience with its Full HD resolution. This ensures sharp and clear images, making it ideal for media consumption, whether you’re watching movies, playing games, or working on graphic design projects. With an Intel Core i5 processor at its core, users can expect strong performance in multitasking scenarios, seamlessly switching between applications. Coupled with 8GB of RAM, the C2N25UA accommodates the demands of resource-intensive tasks, ensuring smooth operation and enhanced productivity.

On the other hand, the D1E81UA model falls under the HP Envy line, designed for users who prioritize premium features. It also boasts a high-resolution display but with additional enhancements such as HP’s BrightView technology, which boosts clarity and brightness, making it suitable for outdoor usage. The D1E81UA is equipped with cutting-edge technologies, including a high-performance Intel Core i7 processor and 16GB of RAM, providing ample power for advanced computing tasks like 3D rendering and video editing.

Both models support fast data transfer thanks to their USB Type-C ports, which offer versatile connectivity options. Additionally, they are equipped with high-definition webcams and dual-array microphones, facilitating clear video calls—a necessity in today’s remote work environment. Their lightweight and sleek designs encourage portability, making them easy to carry between home and the office or for travel.

Battery life in both models is commendable, allowing users to work for extended periods without needing to recharge frequently. Additionally, HP includes its fast charge technology, which powers the battery quickly when time is of the essence.

In conclusion, the HP C2N25UA and D1E81UA are robust laptops that blend performance, stylish design, and advanced technology. Whether for professional tasks or everyday use, these models reflect HP’s commitment to quality and innovation, making them worthy contenders in the competitive laptop market.