Dell OptiPlex 755 Support Question
Dell OptiPlex 755 Support Question
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Question posted by mickkuenma on December 12th, 2013
Dell 755 Will Not Boot 3 And 4 Lights On
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Current Answers
Answer #1: Posted by DellJesse1 on December 12th, 2013 12:46 PM
DellJesse1
Member since:
April 19th, 2012 Points: 1,551,500
Member since:
April 19th, 2012 Points: 1,551,500
mickkuenma,
The 3,4 led error code represents Memory subsystem configuration activity or failure.Memory configuration in progress or failure. You may want to reseat the memory to see if that will resolve the error, If not, run the Dell Diags. Information on running the diags is listed below.
Starting Dell DiagnosticsCustomers can find these instructions in the system Owner’s Manual.
- Turn on or restart the computer.
- When the Dell logo appears, pressimmediately. If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft® Windows® desktop, and then shut down the computer and try again.
- When the boot device list appears, highlight Boot to Utility Partition and press.
- When the Dell Diagnostics main menu appears, select the test you want to run.
Thank You,
Dell-Jesse1
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Related Dell OptiPlex 755 Manual Pages
Quick Reference
Guide - Page 6
...Dell™ OptiPlex™ User's Guide
• Specifications
Microsoft Windows Help and Support
• How to configure system settings
Center
• How to troubleshoot and solve problems
1 Click Start or → Help and Support→ Dell...and solve problems
• How to run the Dell Diagnostics • Error codes and diagnostic lights
NOTE: This document may be optional and may...
Quick Reference
Guide - Page 27
Quick Reference Guide
27
This light indicates that typically remain connected, such as printers and keyboards....devices that a LAN (local area network) connection is being reset (jumpered temporarily).
unjumpered
Desktop Computer
System Views
Front View
1
2
3
11 10 1 USB 2.0
connectors (2)
2 LAN indicator light
9 8 76 5 4
Use the front USB connectors for devices that you use the...
Quick Reference
Guide - Page 62
... and try again.
5 When the boot device list appears, highlight DiagnosticsBoot to Utility Partition and press .
6 Press any key to wait until you to the Dell Diagnostic Utility
• Exit - See... desktop.
If you want
to an electrical outlet. 4 Turn on page 63).
62
Quick Reference Guide See "Starting the Dell Diagnostics From Your Hard Drive" on page 62 or "Starting the Dell ...
Quick Reference
Guide - Page 63
...quickly. NOTE: The next steps change the boot sequence for your computer. 9 When the Dell Diagnostics Main Menu appears, select the test you see "Dell Diagnostics Main Menu" on your part. If
...multiple versions are listed, select the version appropriate for one time only.
This test typically takes 10 to run (see the Windows desktop. ...
Quick Reference
Guide - Page 65
...problem is required. incorrectly installed. If the computer does not boot,
contact Dell for technical
assistance (see "Diagnostic Lights" on page 66). Blinking yellow A power supply or ...the diagnostic lights to wake the computer. On the desktop computer, a solid green light indicates a network connection. User's Guide. Solid yellow
The Dell Diagnostics is running If the Dell Diagnostics is
...
Quick Reference
Guide - Page 66
... front panel.
When the computer starts normally, the lights flash before booting to identify the problem.
Diagnostic Lights
CAUTION: Before you begin any of the lights help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on page 66). Solid green
An integrated system board
power light and device may be faulty.
To help to the...
Quick Reference
Guide - Page 67
... a memory failure has occurred.
• If two or more memory modules are not lit after the system successfully boots to install additional memory modules (one module (see "Contacting Dell" in the User's Guide).
The diagnostic lights are installed, remove the modules (see "Removing Memory" in the User's Guide), then reinstall one at a time...
Quick Reference
Guide - Page 70
Power Light
Problem Description Another failure has occurred.
For example, beep code 1-3-1 (one possible beep code) ...'s Guide) to ensure the boot sequence is correct for the devices installed on your computer.
• If the problem persists, contact Dell (see "Contacting Dell" in the User's Guide). If the problem persists, contact Dell (see "Contacting Dell" in the User's Guide)...
Quick Reference
Guide - Page 83
...
B
beep codes, 70
C
CDs operating system, 9
computer beep codes, 70 restore to previous state, 73
cover opening, 22, 32, 43
D
Dell support site, 8 diagnostic lights, 65-66 diagnostics
beep codes, 70 lights, 65-66 documentation End User License Agreement, 6 ergonomics, 6 online, 8 Product Information Guide, 6 regulatory, 6 safety, 6
documentation (continued) User's Guide, 6 warranty, 6
drivers...
User's Guide - Page 87
....
2 LAN indicator light
This light indicates that you press the power button the computer will perform an operating system shutdown.
4 Dell badge
This badge can also rotate the badge using the slot provided near the bottom of the badge.
87
Desktop Computer
NOTICE: If ..., or for bootable USB devices (see "System Setup" on page 21 for more information about booting to a USB device).
User's Guide - Page 101
... computer from the network environment specified by the remote boot environment (PXE) rather than from one of power from the power supply even when the computer is unplugged from the AC power source.
280 W
Desktop Computer Specifications
101 orange light for 10-Mb operation; amber light - solid green indicates a power-on the system board...
User's Guide - Page 165
...light
Indicates that a LAN (local area network) connection is established.
5 diagnostic lights
Use the lights to help you press the power button the computer will perform an operating system shutdown.
3 Dell... Lights" on page 347.
6 hard drive activity light This light flickers when the hard drive is recommended that you use the back USB connectors for more information about booting ...
User's Guide - Page 178
... button
Power light
green light - in the system setup Boot Sequence option (during system startup only)
displays a boot device menu that allows the user to enter a device for a 1000-Mb (1-Gb) operation
Activity light (on integrated network yellow blinking light adapter)
Diagnostic lights
four lights on the front panel (See "Dell Diagnostics" on page 353.)
Standby power light
AUX_PWR on...
User's Guide - Page 269
... OpenManage™ IT Assistant, or Dell custom-factory integration. Manageability
DASH
DASH (Desktop and mobile Architecture for mobile and desktop hardware. Your computer supports early versions of the DASH initiative including the following management profiles: • Base Desktop Mobile • Power State Management • Boot Control • CPU • System Memory • Fan •...
User's Guide - Page 346
... or incorrectly installed. See "Beep Codes" on page 370).
346
Solving Problems Solid yellow
The Dell Diagnostics is running a If the Dell Diagnostics is identified (see "Diagnostic Lights" on diagnosing the beep code. If the computer does not boot,
contact Dell for technical assistance (see
"Diagnostic Lights" on the system board allow the testing to complete.
User's Guide - Page 347
... (see "Contacting Dell" on page 314) and restart the computer. Light Pattern
Problem Description
Suggested Resolution
The computer is in the Product Information Guide.
When the computer starts normally, the lights flash before booting to install additional memory modules (one module (see "Installing Memory" on page 370).
Solving Problems
347
A possible processor failure...
User's Guide - Page 349
... optical drive), check system setup (see "System Setup" on page 280) to boot from the computer for resource conflicts (see "Troubleshooting Software and Hardware Problems in the... page 358).
4 If the problem persists, contact Dell (see the "Cards" section for each expansion card installed. Solving Problems
349 Light Pattern (continued)
Problem Description
Suggested Resolution
A possible ...
User's Guide - Page 353
... desktop, and then shut down for extended periods of the procedures in this section and run the Dell Diagnostics before you may result when a key is resting on Dell™...the Boot Device Menu.
Dell Diagnostics
CAUTION: Before you experience a problem with the keyboard connector. See "Starting the Dell Diagnostics From Your Hard Drive" on page 353 or "Starting the Dell Diagnostics...
User's Guide - Page 354
...until you select Test System to run the Dell Diagnostics from the boot menu and then press . Selecting Test ...desktop.
NOTE: It is recommended that appear. • If failures are detected, write down -arrow keys to select Diagnostics from your Drivers and Utilities media (see a message stating that appears. 6 Type 1 to start the Drivers and Utilities CD menu. 7 Type 2 to start the Dell...
User's Guide - Page 366
...uses computer-based diagnostics to answer your questions about their portable and desktop computers. When you can call for the information needed to call the ...your region, see "Contacting Dell" on the status of any Dell™ products that correspond to the questions most frequently asked by Dell customers about Dell hardware. Support Service
Dell's support service is available...
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