Question about Dell Dimension C521 PC Desktop

1 Answer

Motherboard change i've recently changed my dell c521 motherboard with a new one because it had the solid amber light power button problem, or famous POST problem, anyway, it was not a PSU problem nor video, memory, hdd, o processor problem. I change the motherboard, now i can boot and get into windows, but the button is still in the solid amber light and the fans run all time... ¿What can i do? Please help.

Posted by on

  • 4 more comments 
  • jethromex Dec 02, 2008

    4 lights off, power button solid amber, aux power in the motherboard solid amber too... fan of the processor is like crazy, fan of the pwsupply seems fine... are you saying that i have a bad pwsupply? It's normal that you get the motherboard damaged and the powersupply too, at the same time? This is the price of "technology"? Can i solve the fans problem getting into Bios? Thanks

  • jethromex Dec 02, 2008

    Dell is a problem too, i'not under warranty anymore, so they really don't care... I have contacted them, told me to unplugg cards, etc.,etc., nothing happend and they could not help me anymore because the warranty. So i go with two technicians and both told me it was the motherboard. One of them was like an official Dell parts supplier, and said to me that a new motherboard was around 500 dollars... I can't afford that -better buy a new pc don't you think so?- I search in the internet and found this supplier, sold me the motherboard for 100 dollars, i installed it, and that's all, i have the problem you now know. The pc turns on without pushing the power button...! I think is a good idea to replace the powersuplly, but i feel more like destroying the pc! Thanks again....

  • jethromex Dec 05, 2008

    Is a UT226 system board for Dell c521. I have not any documentation. Could that help? Thanks

  • jethromex Dec 06, 2008

    is not the ram, i've tested both sticks, one at a time, still the same problem. Tested too the video card, the modem card.. ¿Could it be the cpu fan? I've unplugged it from motherboard but the solid amber light continues... maybe is the powersupply as you first told me, or maybe is the motherboard, i mean, that's just incompatible because it is some kind of evaluation rom... Thanks for the post, and thanks for the answer

  • vikingswn01 Jan 15, 2009

    I have the exactly same problem on my c521, we probably bought the motherboard off the same guy on Ebay. when I boot up i notice that it says evaluation ROM on the first screen. everything seems to work fine when im in windows but Amber light is on and fan keeps running, will the constant running of the fan screw up my computer?

  • makeshappine May 11, 2010

    Did u ever fix it because i have the same exact problem, also the screen resolution is so small i cant adjust it the way i want it. screw the ut226



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 781 Answers

check on system lights... what are the diagnostic lights telling you??
if the 4 lights are off you may have a problem with the led itself or the powersupply is just messing with your head.

Posted on Dec 02, 2008

  • 1 more comment 
  • Francisco Cortes
    Francisco Cortes Dec 02, 2008

    odd... (particular if you say you're able to use your computer while still getting amber lights)..

    the power supply is more likely to fail (it's possible that a bad powersupply could damage a motherboard, not all they way around) than a motherboard so trying to replace the power supply would be something I would consider...

    what's the reference (make and model) of your new motherboard?- I've been interested in knowning what the amber light means on your motherboard and the documentation on your motherboard should give you an idea)

    what is dell saying about your problem? (as per directions on the link I gave you, contacting dell is suggested given the conditions you described

  • Francisco Cortes
    Francisco Cortes Dec 03, 2008

    post the ref number of your new motherboard... is there anything in the motherboard documentation that possibly came with the board regarding the amber lights on it?

  • Francisco Cortes
    Francisco Cortes Dec 06, 2008

    it could be ram.. as read on post above.. test the ram sticks one at a time and see if the computer POSTs correctly, and replace ram accordingly if needed.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How to solve orange solid light on my dell GX520 when i boot it

Nana, A solid amber power button on your GX520, indicates a motherboard failure. The motherboard will need replaced. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Solid orange power button on Optiplex GX520
My Dell Optiplex GX520 will not boot Forums
Dell Optiplex GX520 amber solid light no power

Aug 05, 2016 | Dell Computers & Internet

1 Answer

Dell c521 motherboard diagrams problems

Per Dell's support site: If the power light is a solid amber, a device might be malfunctioning or incorrectly installed.

Turn off the computer and unplug from power:

I would remove and unplug everything except the memory and video card. Then plug the computer back in.
If it posts (dell screen and then a hard drive warning), turn off the computer and start reinstalling each component one at a time and turn on between each install. Hopefully one compenent will fail and you will know what is bad and needs replacing.
If the computer still had the amber light, remove one of the memory modules (hoping you have 2) and try again. If it still fail exchange the modules. If this works you have a bad memory chip, reinstall the rest the componets to double check and power on. Replace the bad chip.
If the computer still fails on both modules, remove both, you should now get a memory beep code, if not then the video card is most likely bad and will need to be replace.

Hope this helps

Jan 31, 2012 | Dell Dimension C521 PC Desktop

1 Answer

I have a Dell Dimension E520 that I've used for

If the power LED is solid Amber, then the like answer is a bad motherboard or peripheral connected to it. So, remove any expansion cards (I See you already removed the Graphics card) and all external connections (Just use power cord) and see if the system will power on with any different indications. If the power LED stays Solid Amber, replace the motherboard

Aug 07, 2011 | Dell Computers & Internet

1 Answer

Orange light remain on switch after powered on computer
If the power button is solid amber, then there is a motherboard failure or a failure in something connected to the motherboard.
Remove any expansion cards and all external connections, if no change replace the motherboard
If the LED is flashing Amber, most likely the power supply

Jul 12, 2011 | Dell OptiPlex 360 Desktop Computer

1 Answer

Hi - our dell dimension c521 is stuck in power save mode. The light on the monitor is solid orange and will not respond to the keyboard or mouse

A solid amber light indicates a pre-POST failure has occurred. The system has received a Power Good signal from the power supply so it's not a power supply issue. HERE is the documentation that tells what the lights mean and possible solutions.

Aug 26, 2010 | Dell Dimension C521 PC Desktop

2 Answers

Solid orange light on my vostro 200

If your fans come on full blast then you have a bad motherboard. If the amber light blinks, you have a bad power supply.

Nov 26, 2009 | Dell Vostro 200 Desktop Computer

1 Answer

Amber light on power button of Dell Dimension 4500

ok - the amber light of doom on a dell means one of two things - either your power supply is pooched - or your motherboard, If under warranty dell will send out a friendly tech to replace them - if not it will cost you a bit. get the price and consider if it worth upgrading instead. Contact your dell rep or dell tech support and see what they say

cheers Pete

Nov 30, 2008 | Dell Dimension 4500 PC Desktop

2 Answers

Yello power light, dell

1st remove all PCI cards, see if anything changes.  If no change\:
If the power LED is solid AMBER, replace the motherboard
If Flashing AMber, replace the power supply

Sep 08, 2008 | Dell OptiPlex GX260 PC Desktop

1 Answer

Amber Light and fan running

1st thing, disconnect everything but keyboard mouse and monitor, see if anything changes.

If the issue persists, ensure that all power and card connections for the motherboard are tight and secure. If you've added RAM or other parts, remove them. Reseat the RAM in the motherboard that came from Dell.

If none of those ideas have any effect on the issue, replace the motherboard.

Jul 01, 2008 | Dell Dimension C521 PC Desktop

Not finding what you are looking for?
Dell Dimension C521 PC Desktop Logo

1,746 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18413 Answers

Alun Cox

Level 3 Expert

2678 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Are you a Dell Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides