Symptoms

Table of Contents: Wireless Networking (Wi-Fi, Bluetooth, GPS and Mobile Broadband) How-to's and TroubleshootingDell Windows Support CenterMouse, Keyboard or Touchpad Not Working CorrectlyThe Computer Stops Responding or troubleshooting slow performance issuesMicrosoft Windows Crashes, Stops, Restarts or a Blue Screen AppearsTroubleshooting a Notebook LCD Screen That is Black, Blank or Hard to SeeHow to Turn the Wireless Antenna On and Off on a Dell ComputerInspiron 14 (3451) DriversUsing and Troubleshooting the Dell Webcam and Dell Webcam Central SoftwareDisabling or Enabling the TouchpadThe Computer Fails to Start or There is No Video Dell PC Diagnostics Quick Test and SupportAssist for PCs and TabletsSpecificationsPort LocationsResetting the System Setup (BIOS) to its Default SettingsComputer Component is not Recognized

Cause

Usage and troubleshooting guide for Dell Inspiron 14 (3451)

Resolution

Wireless Networking (Wi-Fi, Bluetooth, GPS and Mobile Broadband) How-to's and Troubleshooting For how-to's and troubleshooting information on wireless networking please visit the Dell Networking and Wireless Support Center.Back to Top Dell Windows Support Center This link takes you to the Dell Windows Support Center. Select the operating system you need help with.Back to Top Mouse, Keyboard or Touchpad Not Working Correctly Refer to the following Dell Knowledge Base articles for information on using or troubleshooting your mouse, keyboard, or touchpad. Keyboard Usage and Troubleshooting GuideMouse Usage and Troubleshooting GuideTouchpad Usage and Troubleshooting Guide Back to Top The Computer Stops Responding Press the power button for at least 15 seconds to make sure the computer turns off.Disconnect all external peripherals including the keyboard, mouse and external monitor. Peripherals also include external storage devices such as flash drives, USB devices, printers, cards etc.Press the power button to see if the computer turns on and boots up okay; if not, refer to Dell Knowledge Base article Computer Does Not Turn on or is Stuck on the Dell Logo Screen.Download and install SupportAssist. For more information on how to obtain and install SupportAssist, browse to the SupportAssist for PCs and tablets page.Perform system maintenance on your computer-- for more information refer to Dell Knowledge Base article Optimization and Maintenance of Microsoft Windows or Troubleshooting Slow Performance Issues.Start attaching devices to the computer one at a time and test to see if your system stops responding. Back to Top Microsoft Windows Crashes, Stops, Restarts or a Blue Screen Appears This link takes you to the Dell Knowledge Base article Microsoft Windows Locks Up or an Error Occurs.Back to Top Troubleshooting a Notebook LCD Screen That is Black, Blank or Hard to See For information on troubleshooting a notebook LCD Screen, refer to the Dell Knowledge Base article Troubleshooting a Notebook LCD Screen That is Black, Blank or Hard to See.Back to Top How to Turn the Wireless Antenna On and Off on a Dell Computer Press and hold the FN key and then press the PrtScr key. Repeating this will toggle the wireless antenna off and on.For more information on how to turn the wireless antenna on and off on a Dell Computer, refer to Dell Knowledge Base article How to Turn the Wireless Antenna On and Off on a Dell Computer.Back to Top Inspiron 14 (3451) Drivers For information on the drivers available, browse to the Inspiron 14 (3451) Driver Page.This article provides information on how to download drivers for the Inspiron 14 (3451) computer, How to Download and Install a Driver.Back to Top Using and Troubleshooting the Dell Webcam and Dell Webcam Central Software For information on how to troubleshoot the webcam on your computer, refer to Dell Knowledge Base article Using and Troubleshooting the Dell Webcam and Dell Webcam Central Software.Back to Top Disabling or Enabling the Touchpad For information on how to turn the touch pad on or off, refer to Dell Knowledge Base article Disabling or Enabling the Touchpad. Back to Top The Computer Fails to Start or There is No Video If you experience a situation in which the computer does not start at all or if it does turn on (lights turn on and fans are spinning), but the computer does not show any image, listen for a series of beeps during start-up. When beeping codes are heard, refer to (Table 1) to help troubleshoot the issue with your computer. BeepsDescriptionPossible Cause1BIOS ROM checksum in progress or failureSystem board failure, covers BIOS corruption or ROM errors.2No Memory (RAM) detectedMemory or Memory slot failure3 chipset Error (North and South bridge error, DMA/IMR/Timer error)Time-Of-Day Clock test failureGate A20 failureSuper I/O chip failureKeyboard controller test failure System board failure4Memory read / write failureMemory failure5Real Time Clock (RTC) power failCMOS battery failure6Video BIOS test failureVideo subsystem failure7CPU Cache test failureProcessor failure8LCDLCD failure Table 1: Repetitive Beep CodesFor additional help with your computer, please Contact Technical Support. When no beeping codes are heard, perform the following steps: Press the power button for at least 15 seconds to make sure the computer turns off.Disconnect all external peripherals including the keyboard, mouse and external monitor. Peripherals also include external storage devices such as flash drives, USB devices, printers, cards, etc.Remove the A/C adapter from the computer and unplug the adapter from the A/C outlet.Remove the battery; for more information on how to remove the battery, browse to the Inspiron 14 (3451) Online Support Page, click Manuals, click PDF next to Service Manual.Press the power button for 15 seconds to drain the capacitors.Make sure the connections on the power cord and A/C adapter are firmly pressed together.Insert the A/C into the computer and a good A/C outlet.Press the power button to see if the computer turns on and boots up ok, if not, refer to Dell Knowledge Base article Computer Does Not Turn on, or is Stuck on the Dell Logo Screen.Turn the computer off and insert the battery back into the computer.Press the power button to see if the computer turns on and boots up okay; if not, refer to Dell Knowledge Base article Check the Battery.Start attaching devices one at a time and testing to see if the computer will turn on. Back to Top Dell PC Diagnostics Quick Test and SupportAssist for PCs and Tablets The fastest and easiest way to identify and resolve the most common issues is by using our Dell PC Diagnostics quick test. This will either fix the problem automatically, or it will guide you through the steps to resolve the problem. Note: When the diagnostic identifies a failing part, depending on the failing part, we will immediately start the process for a free in-warranty replacement part. SupportAssist, previously called My Dell, provides system updates, detects issues and sends you alerts based on your device, which makes solving and preventing problems easier than ever. This application gives you access to everything you need to take the guesswork out of maintaining PCs and tablets. For more information such as how to obtain and install SupportAssist, browse to the SupportAssist for PCs and tablets page. When the computer cannot access the Internet, you can run the built-in diagnostics on your computer, for more information, refer to Dell Knowledge Base article, Run Built-In Diagnostics (ePSA) for Your System. Back to Top Specifications For information on the Inspiron 14 (3451) Specifications, browse to the Inspiron 14 (3451) Online Manual Page, click PDF next to Specifications.Back to Top Port Locations For information on the port locations, browse to the Inspiron 14 (3451) Online Manual Page, click PDF next to Quick Start Guide or Specifications.Back to Top Resetting the System Setup (BIOS) to its Default Settings Option 1: Reboot the computer.When you see the Dell logo during POST, press the F2 key to enter the setup screen.On the System Setup screen, press the Right Arrow key to move to the Exit menu.Press the Down Arrow key until Restore Defaults is highlighted, and press the Enter key.Press the Enter key on Yes to Load Optimized Defaults and restart the computer. Option 2: Reboot the computer.When you see the Dell logo during POST, press the F2 key to enter the setup screen.On the System Setup screen, press the F9 key.Press the Enter key on Yes to Load Optimized Defaults and restart the computer. Back to Top Computer Component is not Recognized SupportAssist, previously called My Dell, detects issues and sends you alerts based on your device, This application gives you access to everything you need to take the guesswork out of maintaining PCs and tablets. For more information on how to obtain and install SupportAssist, browse to the SupportAssist for PCs and tablets page.Back to Top

Support Cases