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Question posted by Aliceskku on April 29th, 2014

Dell Inspiron N5040 Wont Power On With 3 Beeps

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Answer #1: Posted by BusterDoogen on April 29th, 2014 8:33 AM

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BusterDoogen

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My first thought is to reseat your sodimm modules. Here's the long answer.

In Dell Inspiron N5040 three beep code indicates System board failure which may be caused due to one of the following reasons:

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

Try releasing the residual charge and check if you are able to boot the system. Here are the steps:

Disconnect any external peripherals (flash drives, printers, external hard drives) from the computer including the battery and AC Adapter.
Press and hold the power button for 20 seconds.
Reconnect the battery and the adapter. Try to restart the computer and check the functionality.

If you are able to boot the system, please perform diagnostics to confirm hardware functionality. Here are the steps:

Restart the system and immediately start tapping the 'F12' key to enter the 'Boot Menu'.
Use the 'Down Arrow' key to highlight the 'Diagnostics' option. Press the 'Enter' key.
The diagnostics will begin.

I hope this is helpful to you!

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Related Dell Inspiron N5050 Manual Pages

Owners Manual - Page 1

Dell Inspiron M5040/15-N5040/ 15-N5050 Owner's Manual Regulatory model: P18F Regulatory type: P18F001; P18F002; P18F003

Owners Manual - Page 2

...;, and the Windows start button logo are trademarks of data if instructions are not followed. P18F002; Reproduction of these materials in this text: Dell™, the DELL logo, and Inspiron™ are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. Information in any manner whatsoever...

Owners Manual - Page 4

... the Mini-Card 27 7 Palm-Rest Assembly 29 Removing the Palm-Rest Assembly 29 Replacing the Palm-Rest Assembly 32 8 Power Button Board 35 Removing the Power Button Board 35 Replacing the Power Button Board 36 9 Hard Drive 37 Removing the Hard Drive 37 Replacing the Hard Drive 39 10 Coin-Cell Battery...

Owners Manual - Page 5

... USB Board 44 12 Thermal Cooling Assembly 45 Removing the Thermal Cooling Assembly 45 Replacing the Thermal Cooling Assembly 46 13 Processor Module (For Inspiron 15-N5050/15-N5040 Only 47 Removing the Processor Module 47 Replacing the Processor Module 48 14 Hinge Cover 51 Removing the Hinge Cover 51 Replacing the Hinge...

Owners Manual - Page 9

... exit all open programs before you shut down the operating system, press and hold the power button until the computer turns off. If your computer did not automatically turn off when ... • Phillips screwdriver • Plastic scribe • BIOS executable update program available at support.dell.com Turning Off Your Computer CAUTION: To avoid losing data, save and close all open files ...

Owners Manual - Page 10

... you disconnect the cable. Damage due to ensure your own personal safety. For additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. Hold a card by its edges or by its pull-tab, not on page 9 and all attached devices from their electrical outlets. 10 Before...

Owners Manual - Page 11

... system board, remove the main battery, see "Removing the Battery" on page 13. 8 Turn the computer top-side up, open the display, and press the power button to ground the system board. 6 Disconnect all attached devices from your computer.

Owners Manual - Page 13

... You Begin" on your computer). Do not use only the battery designed for other Dell computers. CAUTION: To avoid damage to servicing that shipped with your warranty. Removing the...bay. Battery 13 Damage due to the computer, use batteries designed for this particular Dell computer. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap...

Owners Manual - Page 15

... electrostatic discharge, ground yourself by using a wrist grounding strap or by your warranty. CAUTION: To help prevent damage to servicing that is not authorized by Dell is not covered by periodically touching an unpainted metal surface (such as possible. 4 Using a plastic scribe, release the four tabs that shipped with your computer...

Owners Manual - Page 19

..." on your computer. 4 Memory Module(s) WARNING: Before working inside your computer, read the safety information that shipped with your computer. See the Specifications at www.dell.com/regulatory_compliance. Memory 19 CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such...

Owners Manual - Page 23

...drive to the system board, remove the main battery, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. See "Removing the Battery" on your computer. CAUTION: Only a certified service...See "Removing the Keyboard" on page 15. 4 Remove the screw that is not authorized by Dell is not covered by periodically touching an unpainted metal surface (such as a connector on page ...

Owners Manual - Page 25

..."Removing the Battery" on page 15. 4 Disconnect the antenna cables from sources other than Dell. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by ...system board. See "Removing the Battery" on page 9. 2 Remove the battery. NOTE: Dell does not guarantee compatibility or provide support for Wireless Local Area Network (WLAN)/Bluetooth combo card....

Owners Manual - Page 28

...) Antenna Cable Color Scheme white black 6 Replace the keyboard. The following table provides the antenna cable color scheme for your computer. 4 Press the other than Dell, you are installing.

Owners Manual - Page 29

..."Before You Begin" on page 13. 3 Remove the 11 screws that is not authorized by Dell is not covered by periodically touching an unpainted metal surface (such as a connector on page 13...the system board, remove the main battery, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. For additional safety best practices information, see "Removing the Battery" on your ...

Owners Manual - Page 30

CAUTION: Pull on the plastic tab on top of the connectors to avoid damaging the connectors. 6 Lift the connector latch that secures the power-button board cable and touch-pad cable to the connectors on the palm-rest assembly. 4 Remove the keyboard. See "Removing the Keyboard" on page 15. 5 Remove the two screws on the system board and remove the cables. 30 Palm-Rest Assembly

Owners Manual - Page 35

...the system board, remove the main battery, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist ... that is not authorized by Dell is not covered by periodically touching an unpainted metal surface (such as a connector on your warranty. Removing the Power Button Board 1 Follow the instructions...

Owners Manual - Page 47

...8 in "Removing the Palm-Rest Assembly" on your computer). Processor Module (For Inspiron 15-N5050/15-N5040 Only)47 CAUTION: Only a certified service technician should perform repairs on page 29.... 13 Processor Module (For Inspiron 15-N5050/15-N5040 Only) WARNING: Before working inside your computer, read the safety information that is not authorized by Dell is not covered by your ...

Owners Manual - Page 48

... the Processor Module 1 Follow the instructions in "Before You Begin" on page 9. Be careful not to illustrate proper installation is shipped. 48 Processor Module (For Inspiron 15-N5050/15-N5040 Only)

Owners Manual - Page 49

... is not seated properly. NOTE: The pin-1 corner of the processor module has a triangle that no stray screws remain inside the computer. Processor Module (For Inspiron 15-N5050/15-N5040 Only) 49 See "Replacing the Battery" on page 14.

Owners Manual - Page 50