Dell 2421- Manuals

Installing the Memory Module 1. Insert the memory module into the memory socket and press until it clicks into place. 2. Install:a) access panelb) battery 3. Follow the procedures in After Working Inside Your Computer. Removing the Hard-Drive Assembly 1. Follow the procedures in Before Working Insid...

5. Remove the screw that secures the hard-drive caddy to the hard drive and remove it. Installing the Hard-Drive Assembly 1. Slide the hard-drive assembly in its slot in the computer. 2. Tighten the screw to secure the hard-drive assembly to the computer. 3. Install:a) memory moduleb) access panelc)...

Removing the Optical-Drive Assembly 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove the battery. 3. Remove the screw that secures the optical drive and slide it out of the drive bay. 4. Remove the screws that secure the optical-drive bracket to the optical-drive assembly. ...

Installing the Palmrest 1. Align and press the palmrest on the computer until it snaps into place on all the sides. 2. Connect the touchpad and power-button cables to the system board. 3. Tighten the screws to secure the palmrest to the system board. 4. Flip the computer and tighten the screws to se...

Installing the Input/Output (I/O) Board 1. Place the I/O board in its slot and snap it in place. 2. Tighten the screw to secure the I/O board to the computer. 3. Connect the I/O cable to the system board. 4. Install:a) palmrestb) keyboardc) access paneld) battery 5. Follow the procedures in After Wo...

Installing the Coin-Cell Battery 1. Place the coin-cell battery in its slot. 2. Install:a) system boardb) wireless mini-cardc) palmrestd) keyboarde) access panelf) battery 3. Follow the procedures in After Working Inside Your Computer. Removing the System Board 1. Follow the procedures in Before Wor...

5. Remove the screw that secures the system board to the computer and lift the system board from the computer. Installing the System Board 1. Align the system board in its place on the computer. 2. Tighten the screw to secure the system board to the computer. 3. Connect the following cables:a) displ...

Removing the Heatsink 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove:a) batteryb) access panelc) memory moduled) hard-drive assemblye) optical-drive assemblyf) keyboardg) palmresth) wireless mini-cardi) system board 3. Flip the system board and place it on a flat surface....

a) system boardb) wireless mini-cardc) palmrestd) keyboarde) optical-drive assemblyf) hard-drive assemblyg) memory moduleh) access paneli) battery 4. Follow the procedures in After Working Inside Your Computer. Removing the Speakers 1. Follow the procedures in Before Working Inside Your Computer. 2....

Installing the Speakers 1. Place the speaker assembly in its slot and route the cables through the channels. 2. Install:a) system boardb) wireless mini-cardc) palmrestd) keyboarde) optical-drive assemblyf) hard-drive assemblyg) memory modelh) access paneli) battery 3. Follow the procedures in After ...

5. Lift the display assembly off the computer. Installing the Display Assembly 1. Place the display assembly on the computer. 2. Route the display cable to its channels. 3. Install:a) system boardb) palmrestc) keyboardd) optical-drive assemblye) hard-drive assemblyf) memory moduleg) access panelh) b...

Removing the Display Bezel 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove:a) batteryb) access panelc) memory moduled) hard-drive assemblye) optical-drive assemblyf) keyboardg) palmresth) display assembly 3. Press the hinge cover on the side. Lift and remove it from the co...

d) hard-drive assemblye) optical-drive assemblyf) keyboardg) plamresth) display assemblyi) display bezel 3. Remove the screws that secure the display hinges to the display panel. 4. Lift the display hinges off the display panel. Installing the Display Hinges 1. Place the display hinge in its place o...

Removing the Camera Module 1. Follow the procedures in Before Working Inside Your Computer. 2. Remove:a) batteryb) access panelc) memory moduled) hard-drive assemblye) optical-drive assemblyf) keyboardg) palmresth) display assemblyi) display bezel 3. Disconnect the camera cable from the connector on...

Installing the Camera Module 1. Connect the camera cable to the connector on the camera module. 2. Align the camera module in its position on the computer. 3. Install:a) display bezelb) display assemblyc) palmrestd) keyboarde) optical-drive assemblyf) hard-drive assemblyg) memory moduleh) access pan...

System Setup System Setup enables you to manage your computer hardware and specify BIOS ‐ level options. From the System Setup, you can: • Change the NVRAM settings after you add or remove hardware • View the system hardware configuration • Enable or disable integrated devices • Set performance and ...

Keys Navigation NOTE: For the standard graphics browser only. <Esc> Moves to the previous page till you view the main screen. Pressing <Esc> in the main screen displays a message that prompts you to save any unsaved changes and restarts the system. <F1> Displays the System Setup he...

CAUTION: The password features provide a basic level of security for the data on your computer. CAUTION: Anyone can access the data stored on your computer if is not locked and left unattended. NOTE: Your computer is shipped with the system and setup password feature disabled. Assigning a System Pas...

Troubleshooting Enhanced Pre-Boot System Assessment (ePSA) Diagnostics The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded with the BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of opti...

Table 7. Battery Status Lights Alternately blinking amber light and blue light An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop. Alternately blinking amber light with steady blue light Temporary battery failure with AC adapter present. Constantly blinking amber light ...

Code Cause and Troubleshooting Steps 6 Video BIOS test failureVideo card failure 7 CPU - cache test failureProcessor failure 8 DisplayDisplay failure LED Error Codes Diagnostic LED codes are communicated via the Power Button LED. The Power Button LED blinks the corresponding LED codes for the corres...

Specifications NOTE: Offerings may vary by region. For more information regarding the configuration of your computer, click Start (Start icon) → Help and Support, and then select the option to view information about your computer. Table 9. System Information Feature Description Chipset Intel HM76 DR...

Contacting Dell NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product catalog. Dell provides several online and telephone-based support and service options. Availability varies by country and product, an...