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How to Use and Troubleshoot the Inspiron 5748

Summary: How to Use and Troubleshoot the Inspiron 5748

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

Table of Contents:

  1. The Computer Fails to Start or There is No Video
  2. The Computer Stops Responding
  3. Dell PC Diagnostics Quick Test and SupportAssist for PCs and Tablets
  4. Troubleshooting a Notebook LCD Screen That is Black, Blank or Hard to See
  5. Inspiron 5748 Specifications
  6. Port Locations
  7. Resetting the System Setup (BIOS) to its Default Settings
  8. Wireless Networking How-to's and Troubleshooting
  9. How to Turn the Wireless Antenna On and Off on a Dell Computer
  10. Mouse, Keyboard or Touchpad Not Working Correctly
  11. Using and Troubleshooting the Dell Webcam and Dell Webcam Central Software
  12. Computer Component is not Recognized
  13. Inspiron 5748 Drivers
  14. Dell Windows Support Center
This article provides information on using and troubleshooting your Inspiron 5748.

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.

Beeps Description Possible Cause
1 BIOS ROM checksum in progress or failure System board failure, covers BIOS corruption or ROM errors.
2 No Memory (RAM) detected Memory or Memory slot failure
3
  • Chipset Error (North and South bridge error, DMA/IMR/Timer error)
  • Time-Of-Day Clock test failure
  • Gate A20 failure
  • Super I/O chip failure
  • Keyboard controller test failure
 System board failure
4 Memory read / write failure Memory failure
5 Real Time Clock (RTC) power fail CMOS battery failure
6 Video BIOS test failure Video subsystem failure
7 CPU Cache test failure Processor failure
8 LCD LCD failure
Table 1: Repetitive Beep Codes
 

When no beeping codes are heard, perform the following steps:

  1. 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.
  2. Remove the A/C adapter from the computer and unplug the adapter from the A/C outlet.
  3. Remove the battery, for more information on how to remove the battery, browse to the Inspiron 5748 Online Manual Page, and click Owner's Manual.
  4. Press the Power button for 15 seconds.
  5. Make sure the connections on the power cord and A/C adapter are firmly pressed together.
  6. Insert the A/C into the computer and a good A/C outlet.
  7. 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.
  8. Turn the computer off and insert the battery back into the computer.
  9. Press the power button to see if the computer turns on and boots up ok, if not, refer to Dell Knowledge Base article Check the Battery.
  10. Start attaching devices one at a time and testing to see if the computer will turn on.
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The Computer Stops Responding

  1. Press the Power button for at least 15 seconds to make sure the computer turns off.
  2. 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.
  3. 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.
  4. Download and install SupportAssist. For more information on how to obtain and install SupportAssist, browse to the SupportAssist for PCs and tablets page.
  5. Perform system maintenance on your computer, for more information refer to Dell Knowledge Base article Optimization and Maintenance of Microsoft Windows.
  6. Start attaching devices one at a time and test to see if the computer stops responding.
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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.
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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.

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Inspiron 5748 Specifications

For information on the Inspiron 5748 Specifications, browse to the Inspiron 5748 Online Manual Page, click Specifications.

You might be asked to provide the Service Tag of your computer, for more information on how to locate your Service Tag, refer to Dell Knowledge base article How to find the service tag on a Dell notebook computer.
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Port Locations

For information on the port locations, browse to the Inspiron 5748 Online Manual Page, click Specifications.

You might be asked to provide the Service Tag of your computer, for more information on how to locate your Service Tag, refer to Dell Knowledge base article How to find the service tag on a Dell notebook computer.
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Resetting the System Setup (BIOS) to its Default Settings

Option 1:
  1. Reboot the computer.
  2. When prompted during POST, press the <F2> key to enter the setup screen.
  3. On the System Setup screen, press the <Right Arrow> key to move to the Exit menu.
  4. Press the <Down Arrow> key until Load Setup Defaults is highlighted, and press the <Enter> key.
  5. Press the <Enter> key on Yes to Restore Defaults and restart the computer.
Option 2:
  1. Reboot the computer.
  2. When prompted during POST, press the <F2> key to enter the setup screen.
  3. On the System Setup screen, press the <F9> key.
  4. Press the <Enter> key on Yes to Load Optimized Defaults and restart the computer.
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Wireless Networking How-to's and Troubleshooting

For how-to's and troubleshooting information on wireless networking please visit the Dell Networking and Wireless Support Center.

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How to Turn the Wireless Antenna On and Off on a Dell Computer

  1. Press the SLN290440_en_US__1I_Keyboards_Wi-Fi_icon_BD_V1 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.
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Mouse, Keyboard or Touchpad Not Working Correctly

Refer to the following Dell Knowledge Base articles for information on how to use or troubleshoot mouse, keyboard or touchpad issues.

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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.

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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.

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Inspiron 5748 Drivers

For information on the Inspiron 5748 drivers available, browse to the Inspiron 5748 Driver Page.

You might be asked to provide the Service Tag of your computer, for more information on how to locate your Service Tag, refer to Dell Knowledge base article How to find the service tag on a Dell notebook computer.

This article provides information on how to download drivers for the Inspiron 5748 computer, How to Download and Install a Driver.

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Dell Windows Support Center

This link takes you to the Dell Windows Support Center. Select the Operating System you need help with.

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Cause

See above

Resolution

See above

Affected Products

Inspiron 5748
Article Properties
Article Number: 000178791
Article Type: Solution
Last Modified: 22 Jul 2024
Version:  6
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