Dell Precision T5400 Support Question
Dell Precision T5400 Support Question
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Question posted by vicalri on August 28th, 2014
Dell Precision T5400 1 2 And 4 Lights And Wont Turn On
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Current Answers
Answer #1: Posted by freginold on November 21st, 2014 4:51 AM
freginold
Member since:
December 20th, 2011 Points: 23,253,895
Member since:
December 20th, 2011 Points: 23,253,895
Often when a computer won't turn on, it's because one of two components has failed: either the power supply unit or the motherboard (assuming you've ruled out the power coming in from the wall or surge protector as the problem).
Power supplies are generally not terribly expensive, compared to other components. If you're not getting any power at all, the power supply is a likely culprit. It's a much cheaper option to try than the motherboard. If you have a voltmeter or a power supply tester, you can check the power supply to verify that it's not supplying any power.
The motherboard is expensive to replace, so if you think the motherboard is the problem (if you've tried the power supply or ruled it out as the problem) it might be cheaper to get a new computer than have the motherboard repaired or replaced.
Power supplies are generally not terribly expensive, compared to other components. If you're not getting any power at all, the power supply is a likely culprit. It's a much cheaper option to try than the motherboard. If you have a voltmeter or a power supply tester, you can check the power supply to verify that it's not supplying any power.
The motherboard is expensive to replace, so if you think the motherboard is the problem (if you've tried the power supply or ruled it out as the problem) it might be cheaper to get a new computer than have the motherboard repaired or replaced.
Related Dell Precision T5400 Manual Pages
Airborne Contaminants Specification Tech Sheet - Page 1
... Contaminants Specification
This technical sheet specifies the allowable airborne contaminant level for operation of Dell Precision™ and Dell™ OptiPlex™ computers that may or may be included in the U.S.A. Dell Inc. disclaims any manner whatsoever without notice. © 2008 Dell Inc. Printed in the documentation you received with your computer. Other trademarks and...
Quick Reference Guide - Page 2
... in this document to refer to hardware or loss of data and tells you make better use of Dell Inc. Other trademarks and trade names may be used in this text: Dell, the DELL logo, and Dell Precision are either the entities claiming the marks and names or their products. disclaims any proprietary interest in...
Quick Reference Guide - Page 3
Contents
Finding Information 5
Setting Up Your Computer 10 Changing Between Tower and Desktop Orientations 10 Installing Your Computer in an Enclosure . . . . . 11 ... Orientation 20 Back Panel Connectors (Tower Orientation) . . . . . 21 Front View (Desktop Orientation 23 Back View (Desktop Orientation 25
Cleaning Your Computer 26 Computer, Keyboard, and Monitor 26 Mouse (Non-Optical 26 ...
Quick Reference Guide - Page 5
...Information
NOTE: Some features or media may be found at support.dell.com.
• How to remove and replace parts
Dell Precision™ User's Guide
• Specifications
Microsoft® Windows®... Help and Support→ Dell User and System Guides→ System Guides.
2 Click the User's Guide for my computer • My device documentation • Desktop System Software (DSS)
Find...
Quick Reference Guide - Page 9
After you ordered.
• How to use Linux
Dell Supported Linux Sites
• E-mail discussions with users of ... with your computer. NOTE: The color of Dell Precision products and the Linux operating system
• Additional information regarding Linux and my Dell Precision computer
• linux.dell.com
• lists.us.dell.com/mailman/listinfo/linuxprecision
Quick Reference Guide
9...
Quick Reference Guide - Page 19
... (or 1-Gbps) network and the computer.
12 diagnostic lights (4)
Use these lights to help you connect occasionally, such as printers and keyboards.
7 Dell rotatable badge
To rotate the Dell badge for tower-to-desktop conversion: remove the front panel ("Removing the Computer Cover" in your User's Guide), turn it over, and rotate the plastic handle behind...
Quick Reference Guide - Page 22
... have a USB keyboard, plug it into the network connector. Flashes a yellow light when the computer is transmitting or receiving network data. If you connect occasionally, ... of the network cable to ensure reliable operation. Dell recommends that the network cable has been securely attached. 6 network adapter connector
7 network activity light
8 serial connectors (2)
9 PS/2 keyboard connector
...
Quick Reference Guide - Page 23
...drive. Front View (Desktop Orientation)
1
2
3
45 6
7
12
11
10
9
8
1 upper 5.25-inch drive bay
2 lower 5.25-inch drive bay
3 FlexBay 4 IEEE 1394
connector (optional) 5 USB 2.0 connectors (2)
6 hard-drive activity light
Holds an Optical ... "System Setup" in your User's Guide.) Dell recommends that typically remain connected, such as digital video cameras and external storage devices.
Quick Reference Guide - Page 24
...-desktop conversion: remove the front panel (see "Removing the Front Panel" in the center of this button indicates power state. The light in your User's Guide), turn it...light
Press the power button to turn off the computer. For more information, see "Power Lights" on the computer. For more information, see "Power Lights" on the diagnostic code. 7 Dell rotatable badge
To rotate the Dell...
Quick Reference Guide - Page 29
... your User's Guide).
• If the problem persists, contact Dell (see "Contacting Dell" in your User's Guide). When the computer starts normally, the lights flash, and then turn off condition or a possible pre-BIOS failure has occurred. Diagnostic Lights
CAUTION: Before you begin any of the lights to the operating system.
To help identify the problem...
Quick Reference Guide - Page 30
... modules are detected, but a memory failure has occurred.
A possible USB failure has occurred. Light Pattern
Problem Description Memory modules are installed, remove the modules (see "Memory" in your User... (see "Memory" in your User's Guide).
• If the problem persists, contact Dell (see "Contacting Dell" in your User's Guide).
• Reseat any installed graphics cards (see "Cards" in...
Quick Reference Guide - Page 31
your User's Guide).
Light Pattern
Problem Description Suggested Resolution
No memory
• If two or more memory ...Perform the procedures in "Restoring Your Operating System" in your User's Guide.
• If the problem persists, contact Dell (see "Contacting Dell" in
has occurred. If the computer starts
normally, continue to install additional
memory modules (one module, and then ...
Quick Reference Guide - Page 32
... is attempting to ensure the boot sequence is correct for the devices installed on your computer.
• If the problem persists, contact Dell (see "Contacting Dell" in your User's Guide). Light Pattern
Problem Description Suggested Resolution
A possible expansion card failure has occurred.
1 Determine if a conflict exists by removing an expansion card (not a graphics...
Quick Reference Guide - Page 52
Ensure that the monitor cable is connected as a lamp. Turn off nearby fans, fluorescent lights, or halogen lamps to the computer.
52
Quick Reference Guide RUN THE SPEAKER DIAGNOSTICS
R E I N S T A L L T H E S O U N D D R I N D O W S V O L U M E C O N...your screen. The screen is connected to support.dell.com. Ensure that the volume is turned up and that the headphone cable is required ...
User's Guide - Page 2
...A CAUTION indicates a potential for property damage, personal injury, or death. Model DCTA
August 2007
P/N NX046 Rev. Reproduction in this text: Dell, the DELL logo, Dell Precision, and Dell OpenManage are registered trademarks of Dell Inc.; Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you how to avoid the problem.
Other trademarks and...
User's Guide - Page 17
What Are You Looking For? Find It Here
• How to use Linux
Dell Supported Linux Sites
• E-mail discussions with users of Dell Precision™ products and the Linux operating system
• Additional information regarding Linux and my Dell Precision computer
• Linux.dell.com
• Lists.us.dell.com/mailman/listinfo/linuxprecision
Finding Information
17
User's Guide - Page 30
..., that will sufficiently cushion it. See "Product Information" on page 291 for more details on the computer. NOTE: To change the configuration of your Dell Precision computer between desktop and tower modes.
NOTICE: To prevent static damage to tower, you must use an optional kit available from the electrical outlet before you can...
User's Guide - Page 49
Multicore processors contain two or more information on your Dell Precision computer. Contact the software manufacturer for updates and information about using two or three physical drives. About RAID Configurations
This section provides an overview of uses, Dell offers RAID level 0, RAID level 1, or RAID level 5 on power management, see "System Setup" on your...
User's Guide - Page 246
... network cable, first plug the cable in to their electrical outlets, and turn them on.
To locate system board connectors, see "System Setup" on ...Cover" on
page 161). Removing a Floppy Drive (Desktop Computer)
1 Follow the procedures in to the computer.
15 Connect your computer works correctly by running the Dell Diagnostics. See "Dell Diagnostics" on page 136. See the documentation that ...
User's Guide - Page 298
....
298
Appendix The following information is provided on the device or devices covered in this document in compliance with the FCC regulations:
• Product name: Dell™ Precision™ T5400
• Model number: DCTA
• Company name...
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