Question about Dell Precision Workstation 490 - MT - 32bit Dual Core Intel Xeon Processor 5120 1.... PC Desktop

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Computer won't boot - there's a flashing 1 and 3

Dell 490 Precision - Computer won't boot - there's a flashing 1 and 3 on the front of the case. It was running - instead of hitting "reboot" I hit "shutdown" and now it's not coming back on.

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Either the power supply has failed or the power cable is not getting power to the board (if the lights are amber). Check that the power cable from the power supply to the motherboard is fully seated. You may need to replace the power supply - you will need one that will fit your case and matches the various devices and plugs that you currently have. (20+4 pin for the motherboard gives the most flexibility, additional power for the CPU (4 pin or 8 pin), SATA if you have SATA devices, regular 4 pin peripherals for IDE hard drives and optical drives, 4 pin floppy, video card (if you have a PCIe card that needs a 6 pin plug), etc.)

I hope this helps.

Cindy Wells

Posted on Jul 13, 2010

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You are now being connected to an agent. Thank you for using Dell
System Connected with TMPw_SumeetD_197007
Abbas Shah Hi, How are you ?
Abbas Shah
I have an issue that when I use my DELL PC for 4 or more hours and
shuts it down. I will not start immediately and I have to wait until 2 more
Abbas Shah LED 1 and 3 along with power yellow light start blinking
Abbas Shah I have precision 490
I am sorry that you are experiencing trouble today, Abbas. I will be
happy to assist you in resolving your issue. Just for your records; I
checked the warranty contract for this system and see that it shipped
on 3/27/2008, and had a warranty that expired on 3/27/2011.
Before we get going, I would like to verify the information you entered
into the chat form.
You entered service tag D1WCZF1. The system is a PRECISION 490
You provided a contact phone number of: .
When the chat window is closed you will automatically receive a
transcript of our session at:
Is all of this information correct?
Abbas Shah Yes, these information are correct
Excellent. Based on the symptoms you are describing, I would advise
trying a known-good power cord connected to a known-good power
If the symptoms still persist, it will be necessary to replace the power
supply unit.
Abbas Shah you mean to say outer power cord, which is connected on back of PSU
TMPw_SumeetD_197007 Correct.
For reference, your service request number for this inquiry is
Abbas Shah
what does this mean "LED 1 and 3 along with power yellow light start
TMPw_SumeetD_197007 Is there anything else I can assist with today?
TMPw_SumeetD_197007 That typically indicates a power supply unit failure.
TMPw_SumeetD_197007 Is there anything else I can assist with today?
Abbas Shah
If I do not want to change my PSU, is there any other way that it can
be solved
Abbas Shah ?
Try replacing the power cord first. If that does not resolve the issue,
the PSU will have to be replaced.
The only other way to resolve the issue would be to replace the whole
Abbas Shah You are joking
TMPw_SumeetD_197007 I am not.
TMPw_SumeetD_197007 Is there anything else I can assist with today?
Abbas Shah Like if I clean my PSU or put it in a freezer to reduce heat
Abbas Shah will it work ?
13:58:16 TMPw_SumeetD_197007 No, that will not work.27/1/2014 Moxie Software(TM) Customer Spaces Channels Customer Client 2/2
TMPw_SumeetD_197007 Is there anything else I can assist with today?
Abbas Shah then why does it take 2 hours to start working again
The PSU is in the process of failing completely. Soon it will not power up
again at all.
TMPw_SumeetD_197007 This is not uncommon for a component which is 6 years old.
Abbas Shah
But it does as I am using my computer right now.. I used my system last
night for 5 hours and shut it down then again I start after 10 minutes it
did not start and took almost 2 hours
TMPw_SumeetD_197007 Is there anything else I can assist with today?
It currently takes almost 2 hours to restart. Soon it will take even longer
to restart it. Soon after that, it will not start at all.
TMPw_SumeetD_197007 When a PSU is failing, this is a fairly typical pattern of symptoms.
Abbas Shah Do you have any solution other than changing the PSU
Abbas Shah
it will cost me alot
The PSU is failing, Abbas. In order to resolve the issue, it should be
replaced. If you have knowledge about how to take a apart a PSU and
examine or replace wiring or capacitors, you can choose to do that at
your discretion, however, there is a risk of fire or electrocution when
taking apart a PSU, and we can not specifically advise doing that, or
provide any instructions on how to do it.
Also, the time and expense involved in attempting to repair a PSU is
likely not much less than replacing the PSU.
TMPw_SumeetD_197007 Ok then, is there anything else I can assist with today?
Abbas Shah Thank you for your all assistance. I will contact you later
Abbas Shah BYE
Thanks again for contacting Dell Technical Support, Abbas Shah! You
can contact us any time at 877-671-3355 or at
You can close this window at your convenience. Have a great day!
System TMPw_SumeetD_197007 has left this session!

Posted on Jan 27, 2014


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• Ensure that no special memory
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• Verify that the memory modules that
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• Reinstall the memory modules and
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• If the problem persists, contact Dell. (if have warranty)

But you can install and check one module at a time.
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