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Dell Precision 390; Power on loud hum and yellow "indicator" on button


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#1 drwmbt

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Posted 10 November 2011 - 12:05 PM

I have a dell precision 390 that im trying to get my companies old operating system off of and prep it for donation to a non-profit org. Im just wondering if this is a power supply issue im having with the machine where it makes a loud hum when i turn it on combined with the orange/amber indicator light (which is typicall green) inside the power button.

Is there a list of error colors dell provides in their manuals? I dont have the document on hand, I suppose i'll try a google search next just wanted to try the forums as well.

edit: there is also an amber light on, on the motherboard as well. this is prob a mobo issue

to recap i've already:
-reset cmos
-removed peripherals and pci devices
-removed ram and booted

dell's support site wasn't much help either as they didnt have an "advanced troubleshooting" page for this model computer.

Edited by drwmbt, 10 November 2011 - 12:39 PM.


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#2 computerxpds

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Posted 10 November 2011 - 01:06 PM

On the back of the machine there should be a series of numbered circular discs that will light up. When you turn it on are any of them a light? If so which ones. Also yes that most likely indicates a bad mobo. Which I have seen from dells often. Also this assumption is based on some of the topics on dells own forum. I would see how much one is, I'm not sure where you would find a replacement from dell unless you called them. :)
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#3 rotor123

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Posted 12 November 2011 - 05:36 PM

http://support.dell.com/support/edocs/systems/ws390/en/ug_en/html/tools.htm

See if that tells you anything.

From here: http://support.dell.com/support/edocs/systems/ws390/en/ug_en/html/geninfo.htm

The power light illuminates and blinks or remains solid to indicate different states:

No light The computer is turned off.
Steady green The computer is in a normal operating state.
Blinking green The computer is in a power-saving state.
Blinking or solid amber See Power Problems.

To exit from a power-saving state, press the power button or use the keyboard or the mouse if it is configured as a wake device in the Windows Device Manager. For more information about sleep states and exiting from a power-saving state, see Power Management.

See Diagnostic Lights for a description of light codes that can help you troubleshoot problems with your computer.

http://support.dell.com/support/edocs/systems/ws390/en/ug_en/html/solving.htm#wp1129674

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