Dell Optiplex 990 Error Lights
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guide to the OptiPlex Diagnostic Indicators Dell OptiPlex systems have a long history of built in diagnostic indicators. These can be audible beeps, power buttons that display different states and colours, specific diagnostics LEDs or a combination of them all, in order to indicate at which point during the Power On Self Test dell optiplex 990 spec (POST) a system is having issues. The following article is a reference guide to the
Dell Optiplex 990 Beep Codes
codes available on each model and what those codes actually mean. These change through the various models and years. These indicators are dell optiplex 990 diagnostic lights 1 3 4 merely a starting point to narrow down any troubleshooting you will carry out to identify the cause of your current issue. You can use this as a starting point to narrow down the proper troubleshooting guide you will dell optiplex 990 diagnostic lights 2 3 4 need or you can contact technical support for further help and they will be looking for these indicators as well. Table of Contents: Diagnostic LEDs for the OptiPlex series (Prior to 2005) Diagnostic LEDs for the OptiPlex Series (2005 to 2009) Diagnostic LEDs for the OptiPlex series (2009 to 2012) Diagnostic LEDs for the OptiPlex series (2012 to Present) OptiPlex Audible Beep Codes Note: For all the tables below, please remember that the diagnostic LEDs
Dell Optiplex 990 Drivers
only serve as an indicator of the progress through the POST process. These LEDs do not indicate the problem that caused the POST routine to stop. Note: Please be aware that if your system completes POST without stopping on a particular error code and then gives a black screen, the most likely reason is that you are experiencing a No Boot issue and not a No POST issue at all. Back to Top 1. Diagnostic LEDs for the OptiPlex series (Prior to 2005) This series of systems had a block of A, B, C, D LEDs on the back of the chassis that lit up in Green and Amber. I've included a table below with what these indicated. These models were readily identifiable by the rounded fronts and clamshell assembly. Note : Please click on the title of the section you want to open below, in order to see the contents. Show all | Hide all Diagnostic LEDs CPU configuration activity or failure; CPU Cache failure LED Pattern State Name State Description Suggested Resolution No Pattern Visible Off System POST complete - LED time-out has occurred If the LEDs came on and then went off, look at troubleshooting the display and the operating system. If the LEDs never came on at any point then look into a power issue. ABCD RCM BIOS
Wiki Navigation On the Wiki Wiki Activity Random page Videos Images Community Recent blog posts Forum Contribute Edit this Page Add a Video Add a Photo Add a Page Wiki Activity Watchlist Random page Recent changes Front dell optiplex 990 manual Panel Lights - Optiplex 990 159pages on this wiki Edit Classic editor History Talk0 Diagnostic dell optiplex 990 sff Lights Edit There are 4 diagnostic lights on the Dell 990 CPU numbered 1, 2, 3, and 4. In adidtion the power button can
Dell Optiplex 990 Power Supply
be blank, orange, or blue. Each combination corresponds to a particular error which can be seen in the below chart. Light Pattern Problem Description Suggested Resolution The computer is off or not receiving power Plug the computer http://www.dell.com/support/article/us/en/04/SLN284978/en into a working electrical outlet and press the power button. A possible system board failure has occurred. Unplug the CPU for 1 minute then reconnect and power on. A possible system board, power supply, or peripheral failure has occurred. Power off computer, leaving the computer plugged in. Press and hold the power supply test button at the rear of the power supply unit. If the LED next to the switch illuminates, the problem may http://f5k.wikia.com/wiki/Front_Panel_Lights_-_Optiplex_990 be with your system board. If the LED next to the switch does not illuminate, disconnect all internal and external peripherals, and press and hold the power supply test button. If it illuminates, there could be a problem with a peripheral. If the LED still does not illuminate, remove the PSU connections from the system board, then press and hold the power supply button. If it illuminates, there could be a problem with the system board. Memory modules are detected, but a memory power failure has occurred. If two or more memory modules are installed, remove the modules, then re-install one module and re-start the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error. If only one memory module is installed, try moving it to a different DIMM connector and re-start the computer. BIOS may be corrupt or missing. A possible system board failure has occurred. Remove all peripheral cards from the PCI and PCI-E slots and re-start the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one.. Power connector not installed properly. Re-seat the 2x2 power connector from the power supply unit. Possible peripheral card or system board failure has occurred
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